diff --git a/src/main/java/com/ycwl/basic/model/pc/coupon/entity/CouponEntity.java b/src/main/java/com/ycwl/basic/model/pc/coupon/entity/CouponEntity.java
index c8c24c1..c48c558 100644
--- a/src/main/java/com/ycwl/basic/model/pc/coupon/entity/CouponEntity.java
+++ b/src/main/java/com/ycwl/basic/model/pc/coupon/entity/CouponEntity.java
@@ -48,6 +48,9 @@ public class CouponEntity {
     private Date createAt;
 
     public BigDecimal calculateDiscountPrice(BigDecimal originalPrice) {
+        if (originalPrice == null) {
+            return BigDecimal.ZERO;
+        }
         if (discountType == 0) {
             return discountPrice;
         } else {
@@ -55,6 +58,9 @@ public class CouponEntity {
         }
     }
     public BigDecimal calculateDiscountPrice(String originalPrice) {
+        if (originalPrice == null) {
+            return BigDecimal.ZERO;
+        }
         BigDecimal priceObj = new BigDecimal(originalPrice);
         if (discountType == 0) {
             return discountPrice;
@@ -63,6 +69,9 @@ public class CouponEntity {
         }
     }
     public String calculateDiscountedPrice(String originalPrice) {
+        if (originalPrice == null) {
+            return "0.00";
+        }
         BigDecimal priceObj = new BigDecimal(originalPrice);
         if (discountType == 0) {
             return priceObj.subtract(discountPrice).setScale(2, RoundingMode.HALF_DOWN).toString();