diff --git a/yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/coupon/CouponApi.java b/yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/coupon/CouponApi.java
index e8a03ae97..9f6cd5c3b 100644
--- a/yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/coupon/CouponApi.java
+++ b/yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/coupon/CouponApi.java
@@ -30,7 +30,7 @@ public interface CouponApi {
     @Parameter(name = "id", description = "优惠券编号", required = true, example = "1")
     CommonResult<Boolean> returnUsedCoupon(@RequestParam("id") Long id);
 
-    @GetMapping(PREFIX + "/validate")
+    @PostMapping(PREFIX + "/validate")
     @Operation(summary = "校验优惠劵")
     CommonResult<CouponRespDTO> validateCoupon(@Valid CouponValidReqDTO validReqDTO);
 
diff --git a/yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/service/coupon/CouponServiceImpl.java b/yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/service/coupon/CouponServiceImpl.java
index d722f4676..d1a8e54b8 100644
--- a/yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/service/coupon/CouponServiceImpl.java
+++ b/yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/service/coupon/CouponServiceImpl.java
@@ -70,7 +70,7 @@ public class CouponServiceImpl implements CouponService {
             throw exception(COUPON_STATUS_NOT_UNUSED);
         }
         // 校验有效期；为避免定时器没跑，实际优惠劵已经过期
-        if (LocalDateTimeUtils.isBetween(coupon.getValidStartTime(), coupon.getValidEndTime())) {
+        if (!LocalDateTimeUtils.isBetween(coupon.getValidStartTime(), coupon.getValidEndTime())) {
             throw exception(COUPON_VALID_TIME_NOT_NOW);
         }
     }