diff --git a/python/paddle/v2/trainer.py b/python/paddle/v2/trainer.py
index bf8b181e42064f01a78b92313805b5fed3a3ceac..44ba9d7ae11679065a9f5758f57e4275678c6206 100644
--- a/python/paddle/v2/trainer.py
+++ b/python/paddle/v2/trainer.py
@@ -113,7 +113,7 @@ class SGD(ITrainer):
                 gm.forwardBackward(feeder(data_batch), out_args, pass_type)
                 gm.eval(pass_evaluator)
                 gm.eval(batch_evaluator)
-                for each_param in gm.getParameters():
+                for each_param in gm.getNonStaticParameters():
                     updater.update(each_param)
                 # Get cost. We use numpy to calculate total cost for this batch.
                 cost_vec = out_args.getSlotValue(0)