diff --git a/doc/doc_en/knowledge_distillation_en.md b/doc/doc_en/knowledge_distillation_en.md
index 52725e5c05..4e1f4e78cb 100755
--- a/doc/doc_en/knowledge_distillation_en.md
+++ b/doc/doc_en/knowledge_distillation_en.md
@@ -228,7 +228,6 @@ Architecture:
               enc_dim: 512
               max_text_length: *max_text_length
 ```
-```
 
 When the model is finally trained, it contains 3 sub-networks: `Teacher`, `Student`, `Student2`.