diff --git a/models/lenet5.py b/models/lenet5.py
index 9d5b054..56c1ca6 100644
--- a/models/lenet5.py
+++ b/models/lenet5.py
@@ -20,21 +20,24 @@ from torch import nn
 from torch.nn import functional as F
 from torch.autograd import Variable
 import torchvision.transforms as transforms
+import numpy as np
 
 from models.basic_model import BasicModel
-
 import utils.plog as plog
 
 class LeNet5(nn.Module):
-    def __init__(self):
+    def __init__(self, num_classes=10, image_size=(28, 28)):
         super().__init__()
         self.conv1 = nn.Conv2d(1, 6, 3, padding=1)
         self.conv2 = nn.Conv2d(6, 16, 3)
         self.conv3 = nn.Conv2d(16, 16, 3)
 
-        self.fc1 = nn.Linear(256, 120)
+        feature_map_size = ((np.array(image_size) // 2 - 2) // 2 - 2)
+        num_features = 16 * feature_map_size[0] * feature_map_size[1]
+
+        self.fc1 = nn.Linear(num_features, 120)
         self.fc2 = nn.Linear(120, 84)
-        self.fc3 = nn.Linear(84, 10)
+        self.fc3 = nn.Linear(84, num_classes)
 
     def forward(self, x):
         '''前向传播函数'''