diff --git a/service/repositories/shopping_cart.go b/service/repositories/shopping_cart.go
index 6c22d7d4..52b38248 100644
--- a/service/repositories/shopping_cart.go
+++ b/service/repositories/shopping_cart.go
@@ -138,7 +138,7 @@ func (d *defaultShoppingCart) CaculateStepPrice(purchaseQuantity int64, stepPric
 		//购买数量>起点
 		if purchaseQuantity > v.StartQuantity {
 			//最后一个 || 小于等于终点
-			if k == l-1 || purchaseQuantity <= v.EndQuantity {
+			if k == l-1 || purchaseQuantity < v.EndQuantity {
 				itemPrice = v.Price + fittingPrice
 				return itemPrice * purchaseQuantity, itemPrice, nil
 			}