diff --git a/app/controllers/api/pm/issues_controller.rb b/app/controllers/api/pm/issues_controller.rb
index c9192ad94..7d681ac55 100644
--- a/app/controllers/api/pm/issues_controller.rb
+++ b/app/controllers/api/pm/issues_controller.rb
@@ -21,20 +21,13 @@ class Api::Pm::IssuesController < Api::Pm::BaseController
 
   def link_index
     pm_issue_type = params[:pm_issue_type] || [1, 2, 3]
-    not_join_id = @issue.pm_links.pluck(:be_linkable_id)
-    not_join_id << @issue.id
-    object_issues = Issue.includes(:pm_links).where(
-      pm_project_id: params[:pm_project_id],
-      root_id: nil,
-      pm_issue_type: pm_issue_type
-    ).where.not(id: not_join_id)
-    @issues = kaminari_paginate(object_issues)
-    render 'api/v1/issues/index'
-  end
+    not_join_id = case params[:issue_filter_type]
+                  when 'leaf_issue'
+                    @issue.pm_links.pluck(:be_linkable_id)
+                  when 'link_issue'
+                    Issue.where(root_id: @issue.id).pluck(:id)
+                  end
 
-  def link_issues
-    pm_issue_type = params[:pm_issue_type] || [1, 2, 3]
-    not_join_id = Issue.where(root_id: @issue.id).pluck(:id)
     not_join_id << @issue.id
     object_issues = Issue.where(
       pm_project_id: params[:pm_project_id],
@@ -45,7 +38,6 @@ class Api::Pm::IssuesController < Api::Pm::BaseController
     render 'api/v1/issues/index'
   end
 
-
   def show
     @issue.associate_attachment_container
     render 'api/v1/issues/show'
diff --git a/config/routes/api.rb b/config/routes/api.rb
index 3a9b4ed88..2a08425c4 100644
--- a/config/routes/api.rb
+++ b/config/routes/api.rb
@@ -11,7 +11,6 @@ defaults format: :json do
         end
         member do
           get :link_index
-          get :link_issues
         end
 
         resources :issue_links