diff --git a/define.go b/define.go
index 21d3863..da708f5 100644
--- a/define.go
+++ b/define.go
@@ -13,8 +13,8 @@ package kafka
 //
 // Date : 4:13 下午 2021/9/21
 type ProducerData struct {
-	Data interface{} // 发送的数据
-	Key  string      // 分区key
+	Data map[interface{}]interface{} // 发送的数据
+	Key  string                      // 分区key
 }
 
 // ProducerResult 数据发送后的结果
diff --git a/producer.go b/producer.go
index 138e748..e8f2eea 100644
--- a/producer.go
+++ b/producer.go
@@ -141,14 +141,10 @@ func (p *Producer) buildMessage(data ProducerData) *sarama.ProducerMessage {
 		Key:       sarama.StringEncoder(data.Key),
 		Timestamp: time.Now(),
 	}
-	switch v := data.Data.(type) {
-	case string:
-		mes.Value = sarama.StringEncoder(v)
-	case []byte:
-		mes.Value = sarama.ByteEncoder(v)
-	default:
-		byteData, _ := json.Marshal(data.Data)
-		mes.Value = sarama.ByteEncoder(byteData)
+	if nil == data.Data {
+		data.Data = make(map[interface{}]interface{})
 	}
+	byteData, _ := json.Marshal(data.Data)
+	mes.Value = sarama.ByteEncoder(byteData)
 	return mes
 }