diff --git a/pages/manage/out-storage-confirm.vue b/pages/manage/out-storage-confirm.vue
index 2037d6b..b8a5ae2 100644
--- a/pages/manage/out-storage-confirm.vue
+++ b/pages/manage/out-storage-confirm.vue
@@ -97,6 +97,7 @@
 				val1: '',
 				val2: '',
 				val3: '',
+				val4: '',
 				val5: '',
 				data: {},
 				title: '',
@@ -104,13 +105,16 @@
 				disabled2: false
 			};
 		},
-		computed: {
-			val4 () {
-				let res = ''
+		watch: {
+			val3 () {
 				if (this.val5 !== '') {
-					res = accSubtract(this.val5, this.val3)
+					this.val4 =  accSubtract(this.val5, this.val3)
+				}
+			},
+			val4 () {
+				if (this.val5 !== '') {
+					this.val3 =  accSubtract(this.val5, this.val4)
 				}
-				return res
 			}
 		},
 		onLoad (options) {