diff --git a/uview-ui/components/u-mask/u-mask.vue b/uview-ui/components/u-mask/u-mask.vue
index 0b55d9d8..1eb15152 100644
--- a/uview-ui/components/u-mask/u-mask.vue
+++ b/uview-ui/components/u-mask/u-mask.vue
@@ -80,8 +80,15 @@
 			maskStyle() {
 				let style = {};
 				style.backgroundColor = "rgba(0, 0, 0, 0.6)";
-				if(this.show) style.zIndex = this.zIndex ? this.zIndex : this.$u.zIndex.mask;
-				else style.zIndex = -1;
+				if(this.show) {
+					// 如果传入了zIndex（包括0），使用传入的值；否则使用默认值
+					// 使用 !== '' 和 !== null 和 !== undefined 来判断是否传入了值
+					style.zIndex = (this.zIndex !== '' && this.zIndex !== null && this.zIndex !== undefined) 
+						? Number(this.zIndex) 
+						: this.$u.zIndex.mask;
+				} else {
+					style.zIndex = -1;
+				}
 				style.transition = `all ${this.duration / 1000}s ease-in-out`;
 				// 判断用户传递的对象是否为空，不为空就进行合并
 				if (Object.keys(this.customStyle).length) style = { 
diff --git a/uview-ui/components/u-popup/u-popup.vue b/uview-ui/components/u-popup/u-popup.vue
index 69c0ec8d..357979ab 100644
--- a/uview-ui/components/u-popup/u-popup.vue
+++ b/uview-ui/components/u-popup/u-popup.vue
@@ -2,7 +2,7 @@
 	<view v-if="visibleSync" :style="[customStyle, {
 		zIndex: uZindex - 1
 	}]" class="u-drawer" hover-stop-propagation>
-		<u-mask :duration="duration" :custom-style="maskCustomStyle" :maskClickAble="maskCloseAble" :z-index="uZindex - 2" :show="showDrawer && mask" @click="maskClick"></u-mask>
+		<u-mask :duration="duration" :custom-style="maskCustomStyle" :maskClickAble="maskCloseAble" :z-index="maskZIndex" :show="showDrawer && mask" @click="maskClick"></u-mask>
 		<view
 			class="u-drawer-content"
 			@tap="modeCenterClose(mode)"
@@ -262,7 +262,18 @@ export default {
 		},
 		// 计算整理后的z-index值
 		uZindex() {
-			return this.zIndex ? this.zIndex : this.$u.zIndex.popup;
+			if (!this.zIndex) {
+				return this.$u.zIndex.popup;
+			}
+			const zIndex = Number(this.zIndex);
+			// 如果转换失败（NaN），使用默认值
+			return isNaN(zIndex) ? this.$u.zIndex.popup : zIndex;
+		},
+		// 计算遮罩层的z-index值，确保始终比内容层低，且基于内容层的zIndex计算
+		maskZIndex() {
+			const contentZIndex = this.uZindex;
+			// 确保遮罩层比内容层至少低2，但至少为1
+			return Math.max(1, contentZIndex - 2);
 		}
 	},
 	watch: {