diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index d0863d1e0..27ca1372f 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -326,7 +326,7 @@ class PullRequestsController < ApplicationController
       # milestone: 0,  #里程碑,未与本地的里程碑关联
     }
     assignee_login = User.find_by_id(params[:assigned_to_id])&.login
-    @requests_params = @local_params.merge({assignee: assignee_login.to_s})
+    @requests_params = @local_params.merge({assignees: [assignee_login.to_s].reject!(&:empty?)})
     @issue_params = {
       author_id: current_user.id,
       project_id: @project.id,