diff --git a/app/controllers/api/pm/issues_controller.rb b/app/controllers/api/pm/issues_controller.rb
index f6dfd39b3..a10a70bce 100644
--- a/app/controllers/api/pm/issues_controller.rb
+++ b/app/controllers/api/pm/issues_controller.rb
@@ -145,7 +145,7 @@ class Api::Pm::IssuesController < Api::Pm::BaseController
       end
       p.workbook.add_worksheet(:name => 'link_relations') do |sheet| 
         # links = PmLink.joins(:linkable_issue).where(issues: {pm_project_id: params[:pm_project_id]})
-        links = PmLink.find_by_sql("SELECT `pm_links`.* FROM `pm_links` INNER JOIN `issues` ON `issues`.`id` = `pm_links`.`linkable_id` AND `pm_links`.`linkable_type` = 'Issue' WHERE `issues`.`pm_project_id` = #{params[pm_project_id]}")
+        links = PmLink.find_by_sql("SELECT `pm_links`.* FROM `pm_links` INNER JOIN `issues` ON `issues`.`id` = `pm_links`.`linkable_id` AND `pm_links`.`linkable_type` = 'Issue' WHERE `issues`.`pm_project_id` = #{params[:pm_project_id]}")
         sheet.add_row ["ID", "被关联工作项ID"]
         links.each do |link|
           sheet.add_row [link.linkable_id, link.be_linkable_id]