diff --git a/apps/wf/views.py b/apps/wf/views.py
index 4263c3ef..8742c47e 100755
--- a/apps/wf/views.py
+++ b/apps/wf/views.py
@@ -420,8 +420,10 @@ class TicketViewSet(CreateUpdateCustomMixin, CreateModelMixin, ListModelMixin, R
         """
         加签
         """
-        ticket = self.get_object()
         data = request.data
+        sr = TicketAddNodeSerializer(data=data)
+        sr.is_valid(raise_exception=True)
+        ticket = self.get_object()
         add_user = User.objects.get(pk=data['toadd_user'])
         ticket.participant_type = State.PARTICIPANT_TYPE_PERSONAL
         ticket.participant = add_user.id
@@ -443,6 +445,10 @@ class TicketViewSet(CreateUpdateCustomMixin, CreateModelMixin, ListModelMixin, R
         加签完成
         """
         ticket = self.get_object()
+        if ticket.in_add_node is False:
+            raise ParseError('该工单不在加签状态中')
+        elif ticket.participant != request.user.id:
+            raise ParseError('非当前加签人')
         ticket.participant_type = State.PARTICIPANT_TYPE_PERSONAL
         ticket.in_add_node = False
         ticket.participant = ticket.add_node_man.id