diff --git a/src/main/java/com/peanut/modules/book/service/impl/MyUserServiceImpl.java b/src/main/java/com/peanut/modules/book/service/impl/MyUserServiceImpl.java
index 259392f5..22194b47 100644
--- a/src/main/java/com/peanut/modules/book/service/impl/MyUserServiceImpl.java
+++ b/src/main/java/com/peanut/modules/book/service/impl/MyUserServiceImpl.java
@@ -7,6 +7,7 @@ import com.aliyun.dysmsapi20170525.models.SendSmsResponseBody;
 import com.aliyun.tea.TeaException;
 import com.aliyun.teautil.Common;
 import com.aliyun.teautil.models.RuntimeOptions;
+import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
 import com.google.common.collect.Maps;
 import com.peanut.common.utils.R;
 import com.peanut.config.DelayQueueConfig;
@@ -223,13 +224,20 @@ public class MyUserServiceImpl extends ServiceImpl<MyUserDao, MyUserEntity> impl
 
         Integer isSale = book.getIsSale();
 
-        if (isSale == 1) {
-            salePrice = book.getSalePrice().subtract(coupon.getCouponAmount());
-        }else {
-            salePrice = book.getPrice().subtract(coupon.getCouponAmount());
+        if(!ObjectUtils.isEmpty(coupon)){
+            if (isSale == 1) {
+                salePrice = book.getSalePrice().subtract(coupon.getCouponAmount());
+            }else {
+                salePrice = book.getPrice().subtract(coupon.getCouponAmount());
+            }
+        }else{
+            if (isSale == 1) {
+                salePrice = book.getSalePrice();
+            }else {
+                salePrice = book.getPrice();
+            }
         }
 
-
         //查询用户
         MyUserEntity user = this.getById(Integer.valueOf(userId));
         Double peanutCoin = user.getPeanutCoin() - salePrice.doubleValue();
@@ -273,10 +281,12 @@ public class MyUserServiceImpl extends ServiceImpl<MyUserDao, MyUserEntity> impl
         userEbookBuyEntity.setPayType("point");
         userEbookBuyEntity.setPayTime(new Date());
         userEbookBuyService.save(userEbookBuyEntity);
+        if(!ObjectUtils.isEmpty(coupon)){
+            CouponHistoryEntity historyEntity = this.couponHistoryService.getOne(new QueryWrapper<CouponHistoryEntity>().eq("member_id", userId).eq("coupon_id", couponId));
+            historyEntity.setUseStatus(2);
+            this.couponHistoryService.updateById(historyEntity);
+        }
 
-        CouponHistoryEntity historyEntity = this.couponHistoryService.getOne(new QueryWrapper<CouponHistoryEntity>().eq("member_id", userId).eq("coupon_id", couponId));
-        historyEntity.setUseStatus(2);
-        this.couponHistoryService.updateById(historyEntity);
 
         return "购买成功！";
     }