diff --git a/app/controllers/forks_controller.rb b/app/controllers/forks_controller.rb
index 93fe9a48d..44b176f82 100644
--- a/app/controllers/forks_controller.rb
+++ b/app/controllers/forks_controller.rb
@@ -12,6 +12,9 @@ class ForksController < ApplicationController
   def authenticate_project!
     if current_user&.id == @project.user_id
       render_result(-1, "自己不能fork自己的项目")
+    elsif ForkUser.exists?(fork_project_id: @project.id, user_id: current_user.id)
+      fork = ForkUser.find_by(fork_project_id: @project.id, user_id: current_user.id)
+      render json: { status: -1, identifier: fork.fork_project&.identifier, message: "fork失败，你已拥有了这个项目" }
     elsif Project.exists?(user_id: current_user.id, identifier: @project.identifier)
       render_result(0, "fork失败，你已拥有了这个项目")
     end