diff --git a/src/pages/order/create.vue b/src/pages/order/create.vue
index cab28dd..801a7a3 100644
--- a/src/pages/order/create.vue
+++ b/src/pages/order/create.vue
@@ -279,7 +279,8 @@ export default {
       }, 0)
       
       // 2. 优惠金额直接使用用户输入的值
-      this.discountAmount = parseFloat(this.discountMoney) || 0
+      const discountMoneyVal = parseFloat(this.discountMoney)
+      this.discountAmount = isNaN(discountMoneyVal) ? 0 : discountMoneyVal
       
       // 3. 计算实付金额 = 原价 - 优惠金额
       this.actualAmount = this.totalAmount - this.discountAmount