diff --git a/mindspore/nn/optim/optimizer.py b/mindspore/nn/optim/optimizer.py
index c2a419c56589c09c9b8eee160f37947f6b018265..bfbde78ffff1c62a17edf14f2e1c5da19bad78dc 100755
--- a/mindspore/nn/optim/optimizer.py
+++ b/mindspore/nn/optim/optimizer.py
@@ -109,7 +109,7 @@ class Optimizer(Cell):
             tuple[Tensor], The gradients after weight decay.
         """
         if self.weight_decay > 0:
-            params = self.params
+            params = self.parameters
             gradients = self.hyper_map(F.partial(apply_decay, self.weight_decay), self.decay_flags, params, gradients)
 
         return gradients