diff --git a/src/components/common/MytTimePicker/index.js b/src/components/common/MytTimePicker/index.js
index bb0019c5..3a12020d 100644
--- a/src/components/common/MytTimePicker/index.js
+++ b/src/components/common/MytTimePicker/index.js
@@ -58,7 +58,8 @@ const defaultProps = {
     default: ''
   },
   format: {
-    type: String
+    type: String,
+    default: ''
   },
   type: {
     type: String,