diff --git a/android/api.md b/android/api.md
index 87c95e0ffb84aec77f6c12ae055cad0e244b91d8..9ad31c98e2d66443b5cf1ebb7b0fa5a8873f2e93 100644
--- a/android/api.md
+++ b/android/api.md
@@ -9,6 +9,9 @@
  * [JSON字段说明](#Json)
  
  
+ 
+### <a herf="https://github.com/oraleval/OralEvalSDKDocPrj/blob/master/android/%E8%AF%84%E6%B5%8Bsdk%E6%B5%81%E7%A8%8B%E5%9B%BE.pdf">SDK调用流程图</a> 
+ 
 
 ### <a name="oralevalsdkfactory"></a>OralEvalSDKFactory