diff --git a/relay/common/relay_info.go b/relay/common/relay_info.go
index e4421fc1..7d4f063c 100644
--- a/relay/common/relay_info.go
+++ b/relay/common/relay_info.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"strconv"
 	"strings"
 	"time"
 
@@ -690,6 +691,7 @@ func (t *TaskSubmitReq) UnmarshalJSON(data []byte) error {
 	type Alias TaskSubmitReq
 	aux := &struct {
 		Metadata json.RawMessage `json:"metadata,omitempty"`
+		Duration json.RawMessage `json:"duration,omitempty"`
 		*Alias
 	}{
 		Alias: (*Alias)(t),
@@ -699,6 +701,20 @@ func (t *TaskSubmitReq) UnmarshalJSON(data []byte) error {
 		return err
 	}
 
+	if len(aux.Duration) > 0 {
+		var durationInt int
+		if err := common.Unmarshal(aux.Duration, &durationInt); err == nil {
+			t.Duration = durationInt
+		} else {
+			var durationStr string
+			if err := common.Unmarshal(aux.Duration, &durationStr); err == nil && durationStr != "" {
+				if v, err := strconv.Atoi(durationStr); err == nil {
+					t.Duration = v
+				}
+			}
+		}
+	}
+
 	if len(aux.Metadata) > 0 {
 		var metadataStr string
 		if err := common.Unmarshal(aux.Metadata, &metadataStr); err == nil && metadataStr != "" {
diff --git a/relay/common/relay_utils.go b/relay/common/relay_utils.go
index 3cbb18c2..18df77a6 100644
--- a/relay/common/relay_utils.go
+++ b/relay/common/relay_utils.go
@@ -204,7 +204,9 @@ func ValidateBasicTaskRequest(c *gin.Context, info *RelayInfo, action string) *d
 		if err != nil {
 			return createTaskError(err, "invalid_multipart_form", http.StatusBadRequest, true)
 		}
-	} else if err := common.UnmarshalBodyReusable(c, &req); err != nil {
+	}
+	// 为了metadata字段的兼容性，统一UnmarshalBodyReusable
+	if err := common.UnmarshalBodyReusable(c, &req); err != nil {
 		return createTaskError(err, "invalid_request", http.StatusBadRequest, true)
 	}