diff --git a/metal/paddle-mobile/paddle-mobile/API/GlobalConfig.swift b/metal/paddle-mobile/paddle-mobile/API/GlobalConfig.swift
index ba15d890a4fcdecc011c2d6dfdeddf87dab3a94e..220b0cea798ec89b8a2042f9d12679b7746be024 100644
--- a/metal/paddle-mobile/paddle-mobile/API/GlobalConfig.swift
+++ b/metal/paddle-mobile/paddle-mobile/API/GlobalConfig.swift
@@ -36,5 +36,5 @@ import Foundation
     @objc public var computePrecision: ComputePrecision = .Float16
     
     /// 是否开启 log
-    @objc public var debug: Bool = true;
+    @objc public var debug: Bool = false
 }