diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index b72a743b..d86578e5 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -103,6 +103,8 @@ class ResMrpWorkOrder(models.Model):
                         record.back_button_display = True
                     else:
                         record.back_button_display = False
+                if cur_workorder.is_subcontract or cur_workorder.name == '解除装夹':
+                    record.back_button_display = False
             else:
                 next_workorder = sorted_workorders[position + 1]
                 next_state = next_workorder.state