diff --git a/douyin.go b/douyin.go
index d6a9797..2a6c40b 100644
--- a/douyin.go
+++ b/douyin.go
@@ -127,20 +127,21 @@ func (d *DouYinOpenApiClient) GetEcpmData(appId, openId, dateHour string) (list
 
 // GetEcpm 计算ECPM
 // https://bytedance.larkoffice.com/docx/Vg4yd0RDSovZINxJDyIc6THhnod
-func (d *DouYinOpenApiClient) GetEcpm(res []douyinopenapi.Record) (ecpm float64, err error) {
+func (d *DouYinOpenApiClient) GetEcpm(res []douyinopenapi.Record) (ecpm float64) {
 	// 计算 ECPM
-	totalCost := 0
 	totalRecords := len(res)
 
+	// 如果没有记录，则返回 0
+	if totalRecords == 0 {
+		return
+	}
+
+	totalCost := 0
+
 	for _, record := range res {
 		totalCost += record.Cost
 	}
 
-	// 如果没有记录，则返回错误
-	if totalRecords == 0 {
-		err = errors.New("未找到记录，无法计算 ECPM")
-		return
-	}
 	// 总 cost / 100000 * 1000 / 总记录数
 	ecpm = float64(totalCost) / 100000 * 1000 / float64(totalRecords)
 	return