diff --git a/app/api/v1/exception/interaction.py b/app/api/v1/exception/interaction.py
index 2c7d8bd..2ddf25d 100644
--- a/app/api/v1/exception/interaction.py
+++ b/app/api/v1/exception/interaction.py
@@ -6,6 +6,11 @@ class AddInteractionError(HTTPError):
     message = 'add interaction failed.'
 
 
+class InteractionExistedError(HTTPError):
+    status_code = 401
+    message = '已经提交过，不能再次提交～'
+
+
 class InteractionTodayBriefNotFound(HTTPError):
     status_code = 404
     message = '找不到用户对应的食物记录'
\ No newline at end of file
diff --git a/app/api/v1/interaction.py b/app/api/v1/interaction.py
index b2d30ef..2673a09 100644
--- a/app/api/v1/interaction.py
+++ b/app/api/v1/interaction.py
@@ -2,7 +2,7 @@ from apiflask import APIBlueprint
 from flask import session
 
 from app import rpc
-from app.api.v1.exception.interaction import AddInteractionError
+from app.api.v1.exception.interaction import AddInteractionError, InteractionExistedError
 from app.api.v1.schema.interaction import (InteractionIn, InteractionBriefIn, InteractionListIn,
                                            InteractionBriefOut, InteractionListOut)
 
@@ -17,7 +17,7 @@ interaction = APIBlueprint('interaction', __name__)
 @login_required
 def add_interaction(json_data):
     try:
-        rpc.interaction.add(**{
+        is_existed = rpc.interaction.add(**{
             'sender': session['user_id'],
             'receiver': json_data['receiver_id'],
             'category': json_data['category'],
@@ -26,6 +26,8 @@ def add_interaction(json_data):
         })
     except Exception as e:
         raise AddInteractionError(extra_data={'error_docs': str(e)})
+    if is_existed:
+        raise InteractionExistedError()
     return {'msg': 'add interaction successfully'}