diff --git a/mindspore/nn/layer/quant.py b/mindspore/nn/layer/quant.py
index 9fbbfa9080..491ff3f9d8 100644
--- a/mindspore/nn/layer/quant.py
+++ b/mindspore/nn/layer/quant.py
@@ -157,7 +157,7 @@ class _Observer(Cell):
         self.quant_dtype = quant_dtype
 
     def extend_repr(self):
-        s = f"dtype={self.dtype}"
+        s = f"quant_dtype={self.quant_dtype}"
         return s
 
     def construct(self):