diff --git a/ss_whitelist/config/nginx.conf b/ss_whitelist/config/nginx.conf
index 83bb092..5fdfa43 100644
--- a/ss_whitelist/config/nginx.conf
+++ b/ss_whitelist/config/nginx.conf
@@ -97,11 +97,19 @@ http {
                 file = io.open("/etc/openresty/allow.list","a+")
                 io.input(file)
                 io.output(file)
-                io.write("allow "..clientIP..";\n")
-                ngx.print("当前IP:"..clientIP.."已添加至白名单")
+                for line in file:lines() do
+                    if string.find(line,clientIP) then
+                        m = string.find(line,clientIP)
+                        ngx.print("当前IP:"..clientIP.."已存在，无需添加")
+                     end
+                end
+                if m == nil then
+                    io.write("allow "..clientIP..";\n")
+                    ngx.print("当前IP:"..clientIP.."已添加至白名单")
+                end
                 io.close(file)
+                os.execute("/usr/local/openresty/nginx/sbin/nginx -s reload")
             }
-
         }
     }
 }