diff --git a/model_zoo/official/nlp/transformer/README.md b/model_zoo/official/nlp/transformer/README.md
index 8e4b163db1..d789d01711 100644
--- a/model_zoo/official/nlp/transformer/README.md
+++ b/model_zoo/official/nlp/transformer/README.md
@@ -54,10 +54,10 @@ After dataset preparation, you can start training and evaluation as follows:
 
 ```bash
 # run training example
-sh scripts/run_standalone_train_ascend.sh 0 52 /path/ende-l128-mindrecord00
+sh scripts/run_standalone_train_ascend.sh 0 52 /path/ende-l128-mindrecord
 
 # run distributed training example
-sh scripts/run_distribute_train_ascend.sh 8 52 /path/newstest2014-l128-mindrecord rank_table.json
+sh scripts/run_distribute_train_ascend.sh 8 52 /path/ende-l128-mindrecord rank_table.json
 
 # run evaluation example
 python eval.py > eval.log 2>&1 &
@@ -104,6 +104,7 @@ usage: train.py  [--distribute DISTRIBUTE] [--epoch_size N] [----device_num N] [
                  [--enable_data_sink ENABLE_DATA_SINK] [--save_checkpoint_steps N]
                  [--save_checkpoint_num N] [--save_checkpoint_path SAVE_CHECKPOINT_PATH]
                  [--data_path DATA_PATH]
+                 [--bucket_boundaries BUCKET_LENGTH]
 
 options:
     --distribute               pre_training by serveral devices: "true"(training by more than 1 device) | "false", default is "false"
@@ -119,6 +120,7 @@ options:
     --save_checkpoint_num      number for saving checkpoint files: N, default is 30
     --save_checkpoint_path     path to save checkpoint files: PATH, default is "./checkpoint/"
     --data_path                path to dataset file: PATH, default is ""
+    --bucket_boundaries        sequence lengths for different bucket: LIST, default is [16, 32, 48, 64, 128]
 ```
 
 ### Running Options
@@ -179,13 +181,13 @@ Parameters for learning rate:
 
     ``` bash
     paste train.tok.clean.bpe.32000.en train.tok.clean.bpe.32000.de > train.all
-    python create_data.py --input_file train.all --vocab_file vocab.bpe.32000 --output_file /path/ende-l128-mindrecord --max_seq_length 128
+    python create_data.py --input_file train.all --vocab_file vocab.bpe.32000 --output_file /path/ende-l128-mindrecord --max_seq_length 128 --bucket [16, 32, 48, 64, 128]
     ```
 - Convert the original data to mindrecord for evaluation:
 
     ``` bash
     paste newstest2014.tok.bpe.32000.en newstest2014.tok.bpe.32000.de > test.all
-    python create_data.py --input_file test.all --vocab_file vocab.bpe.32000 --output_file /path/newstest2014-l128-mindrecord --num_splits 1 --max_seq_length 128 --clip_to_max_len True
+    python create_data.py --input_file test.all --vocab_file vocab.bpe.32000 --output_file /path/newstest2014-l128-mindrecord --num_splits 1 --max_seq_length 128 --clip_to_max_len True --bucket [128]
     ```
 
 
diff --git a/model_zoo/official/nlp/transformer/create_data.py b/model_zoo/official/nlp/transformer/create_data.py
index fc81d3c232..6c68c29696 100644
--- a/model_zoo/official/nlp/transformer/create_data.py
+++ b/model_zoo/official/nlp/transformer/create_data.py
@@ -51,20 +51,29 @@ class SampleInstance():
         return self.__str__()
 
 
-def write_instance_to_file(writer, instance, tokenizer, max_seq_length):
+def write_instance_to_file(writer, instance, tokenizer, max_seq_length, bucket):
     """Create files from `SampleInstance`s."""
+    def _find_bucket_length(num):
+        assert num <= bucket[-1]
+
+        for index in range(1, len(bucket)):
+            if bucket[index - 1] < num <= bucket[index]:
+                return bucket[index]
+        return bucket[0]
 
     def _convert_ids_and_mask(input_tokens):
         input_ids = tokenizer.convert_tokens_to_ids(input_tokens)
         input_mask = [1] * len(input_ids)
         assert len(input_ids) <= max_seq_length
 
-        while len(input_ids) < max_seq_length:
+        seq_max_bucket_length = _find_bucket_length(len(input_ids))
+
+        while len(input_ids) < seq_max_bucket_length:
             input_ids.append(0)
             input_mask.append(0)
 
-        assert len(input_ids) == max_seq_length
-        assert len(input_mask) == max_seq_length
+        assert len(input_ids) == seq_max_bucket_length
+        assert len(input_mask) == seq_max_bucket_length
 
         return input_ids, input_mask
 
@@ -93,7 +102,6 @@ def create_training_instance(source_words, target_words, max_seq_length, clip_to
 
     if len(source_words) >= max_seq_length or len(target_words) >= max_seq_length:
         if clip_to_max_len:
-            print("####lalalal")
             source_words = source_words[:min([len(source_words, max_seq_length-1)])]
             target_words = target_words[:min([len(target_words, max_seq_length-1)])]
         else:
@@ -123,6 +131,8 @@ def main():
     parser.add_argument("--clip_to_max_len", type=bool, default=False,
                         help='clip sequences to maximum sequence length.')
     parser.add_argument("--max_seq_length", type=int, default=128, help='Maximum sequence length.')
+    parser.add_argument("--bucket", type=list, default=[16, 32, 48, 64, 128], help='bucket sequence length')
+
     args = parser.parse_args()
 
     tokenizer = tokenization.WhiteSpaceTokenizer(vocab_file=args.vocab_file)
@@ -179,7 +189,7 @@ def main():
                 if instance is None:
                     continue
 
-                features = write_instance_to_file(writer, instance, tokenizer, args.max_seq_length)
+                features = write_instance_to_file(writer, instance, tokenizer, args.max_seq_length, args.bucket)
                 total_written += 1
 
                 if total_written <= 20:
diff --git a/model_zoo/official/nlp/transformer/scripts/run_distribute_train_ascend.sh b/model_zoo/official/nlp/transformer/scripts/run_distribute_train_ascend.sh
index c7315f1c3e..ea6ea614dc 100644
--- a/model_zoo/official/nlp/transformer/scripts/run_distribute_train_ascend.sh
+++ b/model_zoo/official/nlp/transformer/scripts/run_distribute_train_ascend.sh
@@ -52,7 +52,7 @@ do
     --enable_save_ckpt="true" \
     --enable_lossscale="true" \
     --do_shuffle="true" \
-    --enable_data_sink="true" \
+    --enable_data_sink="false" \
     --checkpoint_path="" \
     --save_checkpoint_steps=2500 \
     --save_checkpoint_num=30 \
diff --git a/model_zoo/official/nlp/transformer/scripts/run_standalone_train_ascend.sh b/model_zoo/official/nlp/transformer/scripts/run_standalone_train_ascend.sh
index 436742ad4a..8e677191a8 100644
--- a/model_zoo/official/nlp/transformer/scripts/run_standalone_train_ascend.sh
+++ b/model_zoo/official/nlp/transformer/scripts/run_standalone_train_ascend.sh
@@ -37,7 +37,7 @@ python train.py  \
     --enable_save_ckpt="true" \
     --enable_lossscale="true" \
     --do_shuffle="true" \
-    --enable_data_sink="true" \
+    --enable_data_sink="false" \
     --checkpoint_path="" \
     --save_checkpoint_steps=2500 \
     --save_checkpoint_num=30 \
diff --git a/model_zoo/official/nlp/transformer/src/beam_search.py b/model_zoo/official/nlp/transformer/src/beam_search.py
index 5200ee32c3..ae437c883f 100644
--- a/model_zoo/official/nlp/transformer/src/beam_search.py
+++ b/model_zoo/official/nlp/transformer/src/beam_search.py
@@ -134,6 +134,7 @@ class BeamSearchDecoder(nn.Cell):
                  eos_id=2,
                  compute_type=mstype.float32):
         super(BeamSearchDecoder, self).__init__(auto_prefix=False)
+        self.seq_length = seq_length
         self.batch_size = batch_size
         self.vocab_size = vocab_size
         self.beam_width = beam_width
@@ -182,7 +183,7 @@ class BeamSearchDecoder(nn.Cell):
         """
         One step for decode
         """
-        log_probs = self.decoder(cur_input_ids, enc_states, enc_attention_mask)
+        log_probs = self.decoder(cur_input_ids, enc_states, enc_attention_mask, self.seq_length)
         log_probs = self.reshape(log_probs, (self.batch_size, self.beam_width, self.vocab_size))
 
         # select topk indices
diff --git a/model_zoo/official/nlp/transformer/src/dataset.py b/model_zoo/official/nlp/transformer/src/dataset.py
index 4eb3858bde..9426f6fd96 100644
--- a/model_zoo/official/nlp/transformer/src/dataset.py
+++ b/model_zoo/official/nlp/transformer/src/dataset.py
@@ -15,30 +15,40 @@
 """Data operations, will be used in train.py."""
 
 import mindspore.common.dtype as mstype
-import mindspore.dataset.engine.datasets as de
+import mindspore.dataset as de
 import mindspore.dataset.transforms.c_transforms as deC
 from .config import transformer_net_cfg
-
+de.config.set_seed(1)
 def create_transformer_dataset(epoch_count=1, rank_size=1, rank_id=0, do_shuffle="true", enable_data_sink="true",
-                               dataset_path=None):
+                               dataset_path=None, bucket_boundaries=None):
     """create dataset"""
-    repeat_count = epoch_count
-    ds = de.MindDataset(dataset_path,
-                        columns_list=["source_eos_ids", "source_eos_mask",
-                                      "target_sos_ids", "target_sos_mask",
-                                      "target_eos_ids", "target_eos_mask"],
-                        shuffle=(do_shuffle == "true"), num_shards=rank_size, shard_id=rank_id)
-
-    type_cast_op = deC.TypeCast(mstype.int32)
-    ds = ds.map(operations=type_cast_op, input_columns="source_eos_ids")
-    ds = ds.map(operations=type_cast_op, input_columns="source_eos_mask")
-    ds = ds.map(operations=type_cast_op, input_columns="target_sos_ids")
-    ds = ds.map(operations=type_cast_op, input_columns="target_sos_mask")
-    ds = ds.map(operations=type_cast_op, input_columns="target_eos_ids")
-    ds = ds.map(operations=type_cast_op, input_columns="target_eos_mask")
+    def batch_per_bucket(bucket_len, dataset_path):
+        dataset_path = dataset_path + "_" + str(bucket_len) + "_00"
+        ds = de.MindDataset(dataset_path,
+                            columns_list=["source_eos_ids", "source_eos_mask",
+                                          "target_sos_ids", "target_sos_mask",
+                                          "target_eos_ids", "target_eos_mask"],
+                            shuffle=(do_shuffle == "true"), num_shards=rank_size, shard_id=rank_id)
+        type_cast_op = deC.TypeCast(mstype.int32)
+        ds = ds.map(operations=type_cast_op, input_columns="source_eos_ids")
+        ds = ds.map(operations=type_cast_op, input_columns="source_eos_mask")
+        ds = ds.map(operations=type_cast_op, input_columns="target_sos_ids")
+        ds = ds.map(operations=type_cast_op, input_columns="target_sos_mask")
+        ds = ds.map(operations=type_cast_op, input_columns="target_eos_ids")
+        ds = ds.map(operations=type_cast_op, input_columns="target_eos_mask")
 
-    # apply batch operations
-    ds = ds.batch(transformer_net_cfg.batch_size, drop_remainder=True)
-    ds = ds.repeat(repeat_count)
+        # apply batch operations
+        ds = ds.batch(transformer_net_cfg.batch_size, drop_remainder=True)
+        ds = ds.repeat(epoch_count)
+        return ds
 
+    for i, _ in enumerate(bucket_boundaries):
+        bucket_len = bucket_boundaries[i]
+        ds_per = batch_per_bucket(bucket_len, dataset_path)
+        if i == 0:
+            ds = ds_per
+        else:
+            ds = ds + ds_per
+    ds = ds.shuffle(ds.get_dataset_size())
+    ds.channel_name = 'transformer'
     return ds
diff --git a/model_zoo/official/nlp/transformer/src/transformer_for_train.py b/model_zoo/official/nlp/transformer/src/transformer_for_train.py
index ebf5a74397..5f04f3a7d1 100644
--- a/model_zoo/official/nlp/transformer/src/transformer_for_train.py
+++ b/model_zoo/official/nlp/transformer/src/transformer_for_train.py
@@ -95,12 +95,13 @@ class TransformerTrainingLoss(nn.Cell):
         self.flatten = P.Flatten()
         self.neg = P.Neg()
         self.cast = P.Cast()
-        self.flat_shape = (config.batch_size * config.seq_length,)
+        self.batch_size = config.batch_size
 
-    def construct(self, prediction_scores, label_ids, label_weights):
+    def construct(self, prediction_scores, label_ids, label_weights, seq_length):
         """Defines the computation performed."""
-        label_ids = self.reshape(label_ids, self.flat_shape)
-        label_weights = self.cast(self.reshape(label_weights, self.flat_shape), mstype.float32)
+        flat_shape = (self.batch_size * seq_length,)
+        label_ids = self.reshape(label_ids, flat_shape)
+        label_weights = self.cast(self.reshape(label_weights, flat_shape), mstype.float32)
         one_hot_labels = self.onehot(label_ids, self.vocab_size, self.on_value, self.off_value)
 
         per_example_loss = self.neg(self.reduce_sum(prediction_scores * one_hot_labels, self.last_idx))
@@ -128,6 +129,7 @@ class TransformerNetworkWithLoss(nn.Cell):
         self.transformer = TransformerModel(config, is_training, use_one_hot_embeddings)
         self.loss = TransformerTrainingLoss(config)
         self.cast = P.Cast()
+        self.shape = P.Shape()
 
     def construct(self,
                   source_ids,
@@ -136,8 +138,10 @@ class TransformerNetworkWithLoss(nn.Cell):
                   target_mask,
                   label_ids,
                   label_weights):
+        """Transformer network with loss."""
         prediction_scores = self.transformer(source_ids, source_mask, target_ids, target_mask)
-        total_loss = self.loss(prediction_scores, label_ids, label_weights)
+        seq_length = self.shape(source_ids)[1]
+        total_loss = self.loss(prediction_scores, label_ids, label_weights, seq_length)
         return self.cast(total_loss, mstype.float32)
 
 
@@ -156,7 +160,6 @@ class TransformerTrainOneStepCell(nn.Cell):
     def __init__(self, network, optimizer, sens=1.0):
         super(TransformerTrainOneStepCell, self).__init__(auto_prefix=False)
         self.network = network
-        self.network.set_grad()
         self.weights = ParameterTuple(network.trainable_params())
         self.optimizer = optimizer
         self.grad = C.GradOperation(get_by_list=True, sens_param=True)
diff --git a/model_zoo/official/nlp/transformer/src/transformer_model.py b/model_zoo/official/nlp/transformer/src/transformer_model.py
index f05757143e..38ae46f358 100644
--- a/model_zoo/official/nlp/transformer/src/transformer_model.py
+++ b/model_zoo/official/nlp/transformer/src/transformer_model.py
@@ -23,6 +23,7 @@ import mindspore.ops.functional as F
 from mindspore.ops import operations as P
 from mindspore.common.tensor import Tensor
 from mindspore.common.parameter import Parameter
+from mindspore.ops.primitive import constexpr
 from .beam_search import BeamSearchDecoder, TileBeam
 from .weight_init import normal_weight, weight_variable
 
@@ -296,8 +297,6 @@ class MultiheadAttention(nn.Cell):
                  from_tensor_width,
                  to_tensor_width,
                  out_tensor_width,
-                 from_seq_length,
-                 to_seq_length,
                  num_attention_heads=1,
                  size_per_head=512,
                  query_act=None,
@@ -312,12 +311,13 @@ class MultiheadAttention(nn.Cell):
                  compute_type=mstype.float32):
         super(MultiheadAttention, self).__init__()
         self.batch_size = batch_size
-        self.from_seq_length = from_seq_length
-        self.to_seq_length = to_seq_length
         self.num_attention_heads = num_attention_heads
         self.size_per_head = size_per_head
         self.has_attention_mask = has_attention_mask
         assert has_attention_mask
+        self.use_one_hot_embeddings = use_one_hot_embeddings
+        self.initializer_range = initializer_range
+        self.do_return_2d_tensor = do_return_2d_tensor
 
         self.scores_mul = Tensor([1.0 / math.sqrt(float(self.size_per_head))], dtype=compute_type)
         self.reshape = P.Reshape()
@@ -345,9 +345,6 @@ class MultiheadAttention(nn.Cell):
                                   has_bias=False,
                                   weight_init=weight_variable([out_tensor_width, units])).to_float(compute_type)
 
-        self.shape_from = (batch_size, from_seq_length, num_attention_heads, size_per_head)
-        self.shape_to = (batch_size, to_seq_length, num_attention_heads, size_per_head)
-
         self.matmul_trans_b = P.BatchMatMul(transpose_b=True)
         self.multiply = P.Mul()
         self.transpose = P.Transpose()
@@ -368,27 +365,33 @@ class MultiheadAttention(nn.Cell):
             self.add = P.TensorAdd()
             self.cast = P.Cast()
             self.get_dtype = P.DType()
-        if do_return_2d_tensor:
-            self.shape_return = (batch_size * from_seq_length, num_attention_heads * size_per_head)
-            if from_seq_length == -1:
-                self.shape_return = (-1, num_attention_heads * size_per_head)
-        else:
-            self.shape_return = (batch_size, from_seq_length, num_attention_heads * size_per_head)
 
         self.cast_compute_type = CastWrapper(dst_type=compute_type)
         self.softmax_cast = P.Cast()
 
-    def construct(self, from_tensor, to_tensor, attention_mask=None):
-        """reshape 2d/3d input tensors to 2d"""
+    def construct(self, from_tensor, to_tensor, seq_length, enc_seq_length, attention_mask=None):
+        """Apply multihead attention."""
+        from_seq_length = seq_length
+        to_seq_length = enc_seq_length
+        shape_from = (self.batch_size, from_seq_length, self.num_attention_heads, self.size_per_head)
+        shape_to = (self.batch_size, to_seq_length, self.num_attention_heads, self.size_per_head)
+        if self.do_return_2d_tensor:
+            shape_return = (self.batch_size * from_seq_length, self.num_attention_heads * self.size_per_head)
+            if from_seq_length == -1:
+                shape_return = (-1, self.num_attention_heads * self.size_per_head)
+        else:
+            shape_return = (self.batch_size, from_seq_length, self.num_attention_heads * self.size_per_head)
+
+        # reshape 2d/3d input tensors to 2d
         from_tensor_2d = self.reshape(from_tensor, self.shape_from_2d)
         to_tensor_2d = self.reshape(to_tensor, self.shape_to_2d)
         query_out = self.query_layer(from_tensor_2d)
         key_out = self.key_layer(to_tensor_2d)
         value_out = self.value_layer(to_tensor_2d)
 
-        query_layer = self.reshape(query_out, self.shape_from)
+        query_layer = self.reshape(query_out, shape_from)
         query_layer = self.transpose(query_layer, self.trans_shape)
-        key_layer = self.reshape(key_out, self.shape_to)
+        key_layer = self.reshape(key_out, shape_to)
         key_layer = self.transpose(key_layer, self.trans_shape)
 
         attention_scores = self.matmul_trans_b(query_layer, key_layer)
@@ -407,12 +410,12 @@ class MultiheadAttention(nn.Cell):
         if self.use_dropout:
             attention_probs = self.dropout(attention_probs)
 
-        value_layer = self.reshape(value_out, self.shape_to)
+        value_layer = self.reshape(value_out, shape_to)
         value_layer = self.transpose(value_layer, self.trans_shape)
         context_layer = self.matmul(attention_probs, value_layer)
 
         context_layer = self.transpose(context_layer, self.trans_shape)
-        context_layer = self.reshape(context_layer, self.shape_return)
+        context_layer = self.reshape(context_layer, shape_return)
         context_layer = self.out_layer(context_layer)
         return context_layer
 
@@ -438,8 +441,6 @@ class SelfAttention(nn.Cell):
     """
     def __init__(self,
                  batch_size,
-                 from_seq_length,
-                 to_seq_length,
                  hidden_size,
                  num_attention_heads=16,
                  attention_probs_dropout_prob=0.1,
@@ -461,8 +462,6 @@ class SelfAttention(nn.Cell):
             from_tensor_width=hidden_size,
             to_tensor_width=hidden_size,
             out_tensor_width=hidden_size,
-            from_seq_length=from_seq_length,
-            to_seq_length=to_seq_length,
             num_attention_heads=num_attention_heads,
             size_per_head=self.size_per_head,
             attention_probs_dropout_prob=attention_probs_dropout_prob,
@@ -477,7 +476,7 @@ class SelfAttention(nn.Cell):
 
         self.reshape = P.Reshape()
         self.shape = (-1, hidden_size)
-    def construct(self, input_tensor, memory_tensor, attention_mask):
+    def construct(self, input_tensor, memory_tensor, attention_mask, seq_length, enc_seq_length):
         """Apply self-attention."""
         input_tensor = self.reshape(input_tensor, self.shape)
         memory_tensor = self.reshape(memory_tensor, self.shape)
@@ -487,7 +486,7 @@ class SelfAttention(nn.Cell):
         if not self.is_encdec_att:
             memory_tensor = output
 
-        attention_output = self.attention(output, memory_tensor, attention_mask)
+        attention_output = self.attention(output, memory_tensor, seq_length, enc_seq_length, attention_mask)
         output = self.postprocess(attention_output, input_tensor)
         return output
 
@@ -563,7 +562,6 @@ class EncoderCell(nn.Cell):
     def __init__(self,
                  batch_size,
                  hidden_size=1024,
-                 seq_length=128,
                  num_attention_heads=16,
                  intermediate_size=4096,
                  attention_probs_dropout_prob=0.1,
@@ -576,8 +574,6 @@ class EncoderCell(nn.Cell):
         self.attention = SelfAttention(
             batch_size=batch_size,
             hidden_size=hidden_size,
-            from_seq_length=seq_length,
-            to_seq_length=seq_length,
             num_attention_heads=num_attention_heads,
             attention_probs_dropout_prob=attention_probs_dropout_prob,
             use_one_hot_embeddings=use_one_hot_embeddings,
@@ -594,9 +590,9 @@ class EncoderCell(nn.Cell):
             hidden_dropout_prob=hidden_dropout_prob,
             compute_type=compute_type)
 
-    def construct(self, hidden_states, attention_mask):
+    def construct(self, hidden_states, attention_mask, seq_length):
         # self-attention with ln, res
-        attention_output = self.attention(hidden_states, hidden_states, attention_mask)
+        attention_output = self.attention(hidden_states, hidden_states, attention_mask, seq_length, seq_length)
         # feed forward with ln, res
         output = self.feedforward(attention_output)
         return output
@@ -624,7 +620,6 @@ class TransformerEncoder(nn.Cell):
     def __init__(self,
                  batch_size,
                  hidden_size,
-                 seq_length,
                  num_hidden_layers,
                  num_attention_heads=16,
                  intermediate_size=4096,
@@ -636,12 +631,13 @@ class TransformerEncoder(nn.Cell):
                  compute_type=mstype.float32):
         super(TransformerEncoder, self).__init__()
         self.num_hidden_layers = num_hidden_layers
+        self.batch_size = batch_size
+        self.hidden_size = hidden_size
 
         layers = []
         for _ in range(num_hidden_layers):
             layer = EncoderCell(batch_size=batch_size,
                                 hidden_size=hidden_size,
-                                seq_length=seq_length,
                                 num_attention_heads=num_attention_heads,
                                 intermediate_size=intermediate_size,
                                 attention_probs_dropout_prob=attention_probs_dropout_prob,
@@ -657,17 +653,18 @@ class TransformerEncoder(nn.Cell):
 
         self.reshape = P.Reshape()
         self.shape = (-1, hidden_size)
-        self.out_shape = (batch_size, seq_length, hidden_size)
 
-    def construct(self, input_tensor, attention_mask):
+    def construct(self, input_tensor, attention_mask, seq_length):
+        """Apply encoder."""
+        out_shape = (self.batch_size, seq_length, self.hidden_size)
         prev_output = self.reshape(input_tensor, self.shape)
 
         for layer_module in self.layers:
-            layer_output = layer_module(prev_output, attention_mask)
+            layer_output = layer_module(prev_output, attention_mask, seq_length)
             prev_output = layer_output
 
         prev_output = self.layer_preprocess(prev_output)
-        output = self.reshape(prev_output, self.out_shape)
+        output = self.reshape(prev_output, out_shape)
         return output
 
 
@@ -693,8 +690,6 @@ class DecoderCell(nn.Cell):
     def __init__(self,
                  batch_size,
                  hidden_size=1024,
-                 seq_length=128,
-                 enc_seq_length=128,
                  num_attention_heads=12,
                  intermediate_size=4096,
                  attention_probs_dropout_prob=0.02,
@@ -707,8 +702,6 @@ class DecoderCell(nn.Cell):
         self.self_attention = SelfAttention(
             batch_size=batch_size,
             hidden_size=hidden_size,
-            from_seq_length=seq_length,
-            to_seq_length=seq_length,
             num_attention_heads=num_attention_heads,
             attention_probs_dropout_prob=attention_probs_dropout_prob,
             use_one_hot_embeddings=use_one_hot_embeddings,
@@ -719,8 +712,6 @@ class DecoderCell(nn.Cell):
         self.cross_attention = SelfAttention(
             batch_size=batch_size,
             hidden_size=hidden_size,
-            from_seq_length=seq_length,
-            to_seq_length=enc_seq_length,
             num_attention_heads=num_attention_heads,
             attention_probs_dropout_prob=attention_probs_dropout_prob,
             use_one_hot_embeddings=use_one_hot_embeddings,
@@ -737,11 +728,12 @@ class DecoderCell(nn.Cell):
             hidden_dropout_prob=hidden_dropout_prob,
             compute_type=compute_type)
 
-    def construct(self, hidden_states, attention_mask, enc_states, enc_attention_mask):
+    def construct(self, hidden_states, attention_mask, enc_states, enc_attention_mask, seq_length, enc_seq_length):
         # self-attention with ln, res
-        attention_output = self.self_attention(hidden_states, hidden_states, attention_mask)
+        attention_output = self.self_attention(hidden_states, hidden_states, attention_mask, seq_length, seq_length)
         # cross-attention with ln, res
-        attention_output = self.cross_attention(attention_output, enc_states, enc_attention_mask)
+        attention_output = self.cross_attention(attention_output, enc_states, enc_attention_mask,
+                                                seq_length, enc_seq_length)
         # feed forward with ln, res
         output = self.feedforward(attention_output)
         return output
@@ -770,8 +762,6 @@ class TransformerDecoder(nn.Cell):
     def __init__(self,
                  batch_size,
                  hidden_size,
-                 seq_length,
-                 enc_seq_length,
                  num_hidden_layers,
                  num_attention_heads=16,
                  intermediate_size=4096,
@@ -788,8 +778,6 @@ class TransformerDecoder(nn.Cell):
         for _ in range(num_hidden_layers):
             layer = DecoderCell(batch_size=batch_size,
                                 hidden_size=hidden_size,
-                                seq_length=seq_length,
-                                enc_seq_length=enc_seq_length,
                                 num_attention_heads=num_attention_heads,
                                 intermediate_size=intermediate_size,
                                 attention_probs_dropout_prob=attention_probs_dropout_prob,
@@ -805,17 +793,21 @@ class TransformerDecoder(nn.Cell):
 
         self.reshape = P.Reshape()
         self.shape = (-1, hidden_size)
-        self.out_shape = (batch_size, seq_length, hidden_size)
+        self.hidden_size = hidden_size
+        self.batch_size = batch_size
 
-    def construct(self, input_tensor, attention_mask, enc_states, enc_attention_mask):
+    def construct(self, input_tensor, attention_mask, enc_states, enc_attention_mask, seq_length, enc_seq_length):
+        """Apply decoder."""
+        out_shape = (self.batch_size, seq_length, self.hidden_size)
         prev_output = self.reshape(input_tensor, self.shape)
 
         for layer_module in self.layers:
-            layer_output = layer_module(prev_output, attention_mask, enc_states, enc_attention_mask)
+            layer_output = layer_module(prev_output, attention_mask, enc_states, enc_attention_mask,
+                                        seq_length, enc_seq_length)
             prev_output = layer_output
 
         prev_output = self.layer_preprocess(prev_output)
-        output = self.reshape(prev_output, self.out_shape)
+        output = self.reshape(prev_output, out_shape)
         return output
 
 
@@ -860,13 +852,11 @@ class PredLogProbs(nn.Cell):
     """
     def __init__(self,
                  batch_size,
-                 seq_length,
                  width,
                  compute_type=mstype.float32,
                  dtype=mstype.float32):
         super(PredLogProbs, self).__init__()
         self.batch_size = batch_size
-        self.seq_length = seq_length
         self.width = width
         self.compute_type = compute_type
         self.dtype = dtype
@@ -874,14 +864,16 @@ class PredLogProbs(nn.Cell):
         self.reshape = P.Reshape()
         self.matmul = P.MatMul(transpose_b=True)
         self.log_softmax = nn.LogSoftmax(axis=-1)
-        self.shape_flat_sequence_tensor = (self.batch_size * self.seq_length, self.width)
         self.cast = P.Cast()
 
     def construct(self,
                   input_tensor,
-                  output_weights):
+                  output_weights,
+                  seq_length):
         """Get log probs."""
-        input_tensor = self.reshape(input_tensor, self.shape_flat_sequence_tensor)
+        shape_flat_sequence_tensor = (self.batch_size * seq_length, self.width)
+
+        input_tensor = self.reshape(input_tensor, shape_flat_sequence_tensor)
         input_tensor = self.cast(input_tensor, self.compute_type)
         output_weights = self.cast(output_weights, self.compute_type)
 
@@ -918,7 +910,6 @@ class TransformerDecoderStep(nn.Cell):
     def __init__(self,
                  batch_size,
                  hidden_size,
-                 enc_seq_length,
                  max_decode_length,
                  num_hidden_layers,
                  num_attention_heads=16,
@@ -942,8 +933,6 @@ class TransformerDecoderStep(nn.Cell):
         self.tfm_decoder = TransformerDecoder(
             batch_size=batch_size,
             hidden_size=hidden_size,
-            seq_length=-1,  # -1 means length is not fixed
-            enc_seq_length=enc_seq_length,
             num_attention_heads=num_attention_heads,
             num_hidden_layers=num_hidden_layers,
             intermediate_size=intermediate_size,
@@ -966,7 +955,7 @@ class TransformerDecoderStep(nn.Cell):
 
         self.cast_compute_type = CastWrapper(dst_type=compute_type)
 
-    def construct(self, input_ids, enc_states, enc_attention_mask):
+    def construct(self, input_ids, enc_states, enc_attention_mask, seq_length):
         """
         Multi-layer transformer decoder step.
         input_ids: [batch_size * beam_width]
@@ -988,17 +977,23 @@ class TransformerDecoderStep(nn.Cell):
         enc_attention_mask = enc_attention_mask[::, 0:input_len:1, ::]
 
         # call TransformerDecoder
-        decoder_output = self.tfm_decoder(input_embedding, input_mask, enc_states, enc_attention_mask)
+        decoder_output = self.tfm_decoder(input_embedding, input_mask, enc_states, enc_attention_mask, -1, seq_length)
 
         # take the last step
         decoder_output = decoder_output[::, input_len-1:input_len:1, ::]
 
         # projection and log_prob
-        log_probs = self.projection(decoder_output, embedding_tables)
+        log_probs = self.projection(decoder_output, embedding_tables, 1)
 
         return log_probs
 
 
+@constexpr
+def convert_np_to_tensor_encoder(seq_length):
+    ones = np.ones(shape=(seq_length, seq_length))
+    return Tensor(np.tril(ones), dtype=mstype.float32)
+
+
 class TransformerModel(nn.Cell):
     """
     Transformer with encoder and decoder.
@@ -1021,12 +1016,13 @@ class TransformerModel(nn.Cell):
 
         self.input_mask_from_dataset = config.input_mask_from_dataset
         self.batch_size = config.batch_size
-        self.seq_length = config.seq_length
         self.hidden_size = config.hidden_size
         self.num_hidden_layers = config.num_hidden_layers
         self.embedding_size = config.hidden_size
 
         self.last_idx = self.num_hidden_layers - 1
+        self.beam_width = config.beam_width
+        self.max_decode_length = config.max_decode_length
 
         self.tfm_embedding_lookup = EmbeddingLookup(
             vocab_size=config.vocab_size,
@@ -1048,7 +1044,6 @@ class TransformerModel(nn.Cell):
         self.tfm_encoder = TransformerEncoder(
             batch_size=self.batch_size,
             hidden_size=self.hidden_size,
-            seq_length=self.seq_length,
             num_attention_heads=config.num_attention_heads,
             num_hidden_layers=self.num_hidden_layers,
             intermediate_size=config.intermediate_size,
@@ -1062,15 +1057,12 @@ class TransformerModel(nn.Cell):
         if is_training:
             self.projection = PredLogProbs(
                 batch_size=self.batch_size,
-                seq_length=self.seq_length,
                 width=self.hidden_size,
                 compute_type=config.compute_type,
                 dtype=config.dtype)
             self.tfm_decoder = TransformerDecoder(
                 batch_size=self.batch_size,
                 hidden_size=self.hidden_size,
-                seq_length=self.seq_length,
-                enc_seq_length=self.seq_length,
                 num_attention_heads=config.num_attention_heads,
                 num_hidden_layers=self.num_hidden_layers,
                 intermediate_size=config.intermediate_size,
@@ -1083,14 +1075,12 @@ class TransformerModel(nn.Cell):
         else:
             self.projection = PredLogProbs(
                 batch_size=self.batch_size * config.beam_width,
-                seq_length=1,
                 width=self.hidden_size,
                 compute_type=config.compute_type,
                 dtype=config.dtype)
             self.tfm_decoder = TransformerDecoderStep(
                 batch_size=self.batch_size * config.beam_width,
                 hidden_size=self.hidden_size,
-                enc_seq_length=self.seq_length,
                 max_decode_length=config.max_decode_length,
                 num_hidden_layers=config.num_hidden_layers,
                 num_attention_heads=config.num_attention_heads,
@@ -1113,24 +1103,24 @@ class TransformerModel(nn.Cell):
                 length_penalty_weight=config.length_penalty_weight,
                 max_decode_length=config.max_decode_length)
 
+            self.tfm_decoder.add_flags(loop_can_unroll=True)
+            self.tile_beam = TileBeam(beam_width=self.beam_width)
+            ones = np.ones(shape=(self.batch_size, self.max_decode_length))
+            self.encdec_mask = Tensor(ones, mstype.float32)
+
         self.cast = P.Cast()
         self.dtype = config.dtype
         self.cast_compute_type = CastWrapper(dst_type=config.compute_type)
         self.expand = P.ExpandDims()
         self.multiply = P.Mul()
+        self.shape = P.Shape()
 
         self._create_attention_mask_from_input_mask = CreateAttentionMaskFromInputMask()
 
-        if is_training:
-            ones = np.ones(shape=(self.seq_length, self.seq_length))
-            self.future_mask = Tensor(np.tril(ones), dtype=mstype.float32)
-        else:
-            self.tile_beam = TileBeam(beam_width=config.beam_width)
-            ones = np.ones(shape=(config.batch_size, config.max_decode_length))
-            self.encdec_mask = Tensor(ones, dtype=mstype.float32)
-
     def construct(self, source_ids, source_mask, target_ids=None, target_mask=None):
         """Transformer with encoder and decoder."""
+        seq_length = self.shape(source_ids)[1]
+
         # process source sentence
         src_word_embeddings, embedding_tables = self.tfm_embedding_lookup(source_ids)
         src_embedding_output = self.tfm_embedding_postprocessor_for_encoder(src_word_embeddings)
@@ -1138,21 +1128,24 @@ class TransformerModel(nn.Cell):
         enc_attention_mask = self._create_attention_mask_from_input_mask(source_mask)
         # transformer encoder
         encoder_output = self.tfm_encoder(self.cast_compute_type(src_embedding_output),
-                                          self.cast_compute_type(enc_attention_mask))
+                                          self.cast_compute_type(enc_attention_mask),
+                                          seq_length)
 
         if self.is_training:
+            future_mask = convert_np_to_tensor_encoder(seq_length)
             # process target sentence
             tgt_word_embeddings, _ = self.tfm_embedding_lookup(target_ids)
             tgt_embedding_output = self.tfm_embedding_postprocessor_for_decoder(tgt_word_embeddings)
             # attention mask [batch_size, seq_length, seq_length]
             tgt_attention_mask = self._create_attention_mask_from_input_mask(target_mask)
-            tgt_attention_mask = self.multiply(tgt_attention_mask, self.expand(self.future_mask, 0))
+            tgt_attention_mask = self.multiply(tgt_attention_mask, self.expand(future_mask, 0))
             # transformer decoder
             decoder_output = self.tfm_decoder(self.cast_compute_type(tgt_embedding_output),
                                               self.cast_compute_type(tgt_attention_mask),
-                                              encoder_output, enc_attention_mask)
+                                              encoder_output, enc_attention_mask,
+                                              seq_length, seq_length)
             # calculate logits and log_probs
-            log_probs = self.projection(decoder_output, embedding_tables)
+            log_probs = self.projection(decoder_output, embedding_tables, seq_length)
             ret = log_probs
         else:
             beam_encoder_output = self.tile_beam(encoder_output)
diff --git a/model_zoo/official/nlp/transformer/train.py b/model_zoo/official/nlp/transformer/train.py
index 6fe89453d0..31a9b0dcee 100644
--- a/model_zoo/official/nlp/transformer/train.py
+++ b/model_zoo/official/nlp/transformer/train.py
@@ -105,6 +105,9 @@ def argparse_init():
     parser.add_argument("--save_checkpoint_path", type=str, default="./checkpoint/", help="Save checkpoint file path, "
                                                                                           "default is ./checkpoint/")
     parser.add_argument("--data_path", type=str, default="", help="Data path, it is better to use absolute path")
+    parser.add_argument("--bucket_boundaries", type=list, default=[16, 32, 48, 64, 128], help="sequence length for "
+                                                                                              "different bucket")
+
     return parser
 
 def run_transformer_train():
@@ -129,7 +132,8 @@ def run_transformer_train():
     dataset = create_transformer_dataset(epoch_count=1, rank_size=device_num,
                                          rank_id=rank_id, do_shuffle=args.do_shuffle,
                                          enable_data_sink=args.enable_data_sink,
-                                         dataset_path=args.data_path)
+                                         dataset_path=args.data_path,
+                                         bucket_boundaries=args.bucket_boundaries)
 
     netwithloss = TransformerNetworkWithLoss(transformer_net_cfg, True)
 
diff --git a/tests/st/model_zoo_tests/transformer/test_transformer.py b/tests/st/model_zoo_tests/transformer/test_transformer.py
index 5e413edf74..9782f7ad76 100644
--- a/tests/st/model_zoo_tests/transformer/test_transformer.py
+++ b/tests/st/model_zoo_tests/transformer/test_transformer.py
@@ -24,12 +24,13 @@ from mindspore.nn.optim import Adam
 from mindspore.train.model import Model
 from mindspore.train.loss_scale_manager import DynamicLossScaleManager
 from mindspore.train.callback import Callback
+import mindspore.dataset.engine as de
+import mindspore.dataset.transforms.c_transforms as deC
 from mindspore import context
 from model_zoo.official.nlp.transformer.src.transformer_model import TransformerConfig
 from model_zoo.official.nlp.transformer.src.transformer_for_train import TransformerNetworkWithLoss, \
                                             TransformerTrainOneStepWithLossScaleCell
-from model_zoo.official.nlp.transformer.src.config import cfg
-from model_zoo.official.nlp.transformer.src.dataset import create_transformer_dataset
+from model_zoo.official.nlp.transformer.src.config import cfg, transformer_net_cfg
 from model_zoo.official.nlp.transformer.src.lr_schedule import create_dynamic_lr
 
 DATA_DIR = ["/home/workspace/mindspore_dataset/transformer/test-mindrecord"]
@@ -76,6 +77,24 @@ def get_config(version='base', batch_size=1):
         transformer_cfg = TransformerConfig(batch_size=batch_size)
     return transformer_cfg
 
+def load_test_data(batch_size=1, data_file=None):
+    """Load test dataset."""
+    ds = de.MindDataset(data_file,
+                        columns_list=["source_eos_ids", "source_eos_mask",
+                                      "target_sos_ids", "target_sos_mask",
+                                      "target_eos_ids", "target_eos_mask"],
+                        shuffle=False)
+    type_cast_op = deC.TypeCast(mstype.int32)
+    ds = ds.map(operations=type_cast_op, input_columns="source_eos_ids")
+    ds = ds.map(operations=type_cast_op, input_columns="source_eos_mask")
+    ds = ds.map(operations=type_cast_op, input_columns="target_sos_ids")
+    ds = ds.map(operations=type_cast_op, input_columns="target_sos_mask")
+    ds = ds.map(operations=type_cast_op, input_columns="target_eos_ids")
+    ds = ds.map(operations=type_cast_op, input_columns="target_eos_mask")
+    # apply batch operations
+    ds = ds.batch(batch_size, drop_remainder=True)
+    return ds
+
 class ModelCallback(Callback):
     def __init__(self):
         super(ModelCallback, self).__init__()
@@ -120,10 +139,7 @@ def test_transformer():
     batch_size = 96
     epoch_size = 3
     config = get_config(version=version, batch_size=batch_size)
-    dataset = create_transformer_dataset(epoch_count=1,
-                                         do_shuffle="false",
-                                         enable_data_sink="false",
-                                         dataset_path=DATA_DIR)
+    dataset = load_test_data(batch_size=transformer_net_cfg.batch_size, data_file=DATA_DIR)
 
     netwithloss = TransformerNetworkWithLoss(config, True)