diff --git a/fastNLP/core/drivers/paddle_driver/paddle_driver.py b/fastNLP/core/drivers/paddle_driver/paddle_driver.py
index 6de9579b..00b0da4e 100644
--- a/fastNLP/core/drivers/paddle_driver/paddle_driver.py
+++ b/fastNLP/core/drivers/paddle_driver/paddle_driver.py
@@ -71,8 +71,6 @@ class PaddleDriver(Driver):
 
         :param set_to_none: 用来判断是否需要将梯度直接置为 None；Paddle中这个参数无效。
         """
-        if set_to_none:
-            logger.rank_zero_warning("Parameter `set_to_none` does nothing in paddle since grad cannot be set directly.")
         for optimizer in self.optimizers:
             optimizer.clear_grad()