diff --git a/library/think/Session.php b/library/think/Session.php
index 626c8c11..9bafe116 100644
--- a/library/think/Session.php
+++ b/library/think/Session.php
@@ -114,7 +114,9 @@ class Session
         if (is_null(self::$init)) {
             self::init();
         } elseif (false === self::$init) {
-            session_start();
+            if (PHP_SESSION_ACTIVE != session_status()) {
+                session_start();
+            }
             self::$init = true;
         }
     }