diff --git a/doc/fluid/design/dynamic_rnn/rnn.md b/doc/fluid/design/dynamic_rnn/rnn.md
index 3e7f38d2d6f962b5d7d7fb7e168768c071bf048e..cca2e69710b60149e1a8a3de061a2693e26071ac 100644
--- a/doc/fluid/design/dynamic_rnn/rnn.md
+++ b/doc/fluid/design/dynamic_rnn/rnn.md
@@ -49,7 +49,7 @@ or copy the memory value of the previous step to the current ex-memory variable.
 
 ### Usage in Python
 
-For more information on Block, please refer to the [design doc](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/design/block.md).
+For more information on Block, please refer to the [design doc](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/fluid/design/concepts/block.md).
 
 We can define an RNN's step-net using a Block: