diff --git a/common/nav-calc-utils.js b/common/nav-calc-utils.js
index 5e6682a..67b7afa 100644
--- a/common/nav-calc-utils.js
+++ b/common/nav-calc-utils.js
@@ -70,8 +70,8 @@ function navParams() {
 	}
 	// params.navBar.paddingRight = params.window.width - menuButton.right;
 	params.navBar.height = params.menuButton.height + params.navBar.paddingTop + params.navBar.paddingBottom;
-	// 导航栏可用宽度 屏幕宽度 - 胶囊左侧坐标
-	params.navBar.enableWidth = params.window.width - menuButton.left;
+	// 导航栏可用宽度 屏幕左边界到胶囊左边界
+	params.navBar.enableWidth = menuButton.left;
 	params.navBar.disableWidth = params.window.width - params.navBar.enableWidth;
 	params.navBar.enableHeight = params.navBar.height - params.navBar.paddingTop - params.navBar.paddingBottom;
 	// #endif