diff --git a/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.h b/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.h
index a81624621f..da559bcd17 100644
--- a/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.h
+++ b/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.h
@@ -44,6 +44,8 @@ extern NSString* const KEY_PAGE_PROPERTIES_RENDER_TYPE;
 extern NSString* const KEY_PAGE_STAGES_START;
 extern NSString* const KEY_PAGE_STAGES_DOWN_BUNDLE_START;
 extern NSString* const KEY_PAGE_STAGES_DOWN_BUNDLE_END;
+extern NSString* const KEY_PAGE_STAGES_CUSTOM_PREPROCESS_START;
+extern NSString* const KEY_PAGE_STAGES_CUSTOM_PREPROCESS_END;
 extern NSString* const KEY_PAGE_STAGES_RENDER_ORGIGIN;
 extern NSString* const KEY_PAGE_STAGES_LOAD_BUNDLE_START;
 extern NSString* const KEY_PAGE_STAGES_LOAD_BUNDLE_END;
diff --git a/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.m b/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.m
index d44effd6ef..7a8822dcd0 100644
--- a/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.m
+++ b/ios/sdk/WeexSDK/Sources/Performance/WXApmForInstance.m
@@ -57,6 +57,8 @@
 NSString* const KEY_PAGE_STAGES_START = @"wxRecordStart";
 NSString* const KEY_PAGE_STAGES_DOWN_BUNDLE_START  = @"wxStartDownLoadBundle";
 NSString* const KEY_PAGE_STAGES_DOWN_BUNDLE_END  = @"wxEndDownLoadBundle";
+NSString* const KEY_PAGE_STAGES_CUSTOM_PREPROCESS_START  = @"wxCustomPreprocessStart";
+NSString* const KEY_PAGE_STAGES_CUSTOM_PREPROCESS_END  = @"wxCustomPreprocessEnd";
 NSString* const KEY_PAGE_STAGES_RENDER_ORGIGIN  = @"wxRenderTimeOrigin";
 NSString* const KEY_PAGE_STAGES_LOAD_BUNDLE_START  = @"wxStartLoadBundle";
 NSString* const KEY_PAGE_STAGES_LOAD_BUNDLE_END  = @"wxEndLoadBundle";