diff --git a/backend/internal/service/sora_gateway_service.go b/backend/internal/service/sora_gateway_service.go
index 04c4a9a9..b8241eef 100644
--- a/backend/internal/service/sora_gateway_service.go
+++ b/backend/internal/service/sora_gateway_service.go
@@ -1,6 +1,7 @@
 package service
 
 import (
+	"bytes"
 	"context"
 	"encoding/base64"
 	"encoding/json"
@@ -830,7 +831,7 @@ func (s *SoraGatewayService) writeSoraStream(c *gin.Context, model, content stri
 			},
 		},
 	}
-	encoded, _ := json.Marshal(chunk)
+	encoded, _ := jsonMarshalRaw(chunk)
 	if _, err := fmt.Fprintf(writer, "data: %s\n\n", encoded); err != nil {
 		return nil, err
 	}
@@ -851,7 +852,7 @@ func (s *SoraGatewayService) writeSoraStream(c *gin.Context, model, content stri
 			},
 		},
 	}
-	finalEncoded, _ := json.Marshal(finalChunk)
+	finalEncoded, _ := jsonMarshalRaw(finalChunk)
 	if _, err := fmt.Fprintf(writer, "data: %s\n\n", finalEncoded); err != nil {
 		return &ms, err
 	}
@@ -1052,6 +1053,23 @@ func (s *SoraGatewayService) normalizeSoraMediaURLs(urls []string) []string {
 	return output
 }
 
+// jsonMarshalRaw 序列化 JSON，不转义 &、<、> 等 HTML 字符，
+// 避免 URL 中的 & 被转义为 \u0026 导致客户端无法直接使用。
+func jsonMarshalRaw(v any) ([]byte, error) {
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	enc.SetEscapeHTML(false)
+	if err := enc.Encode(v); err != nil {
+		return nil, err
+	}
+	// Encode 会追加换行符，去掉它
+	b := buf.Bytes()
+	if len(b) > 0 && b[len(b)-1] == '\n' {
+		b = b[:len(b)-1]
+	}
+	return b, nil
+}
+
 func buildSoraContent(mediaType string, urls []string) string {
 	switch mediaType {
 	case "image":
diff --git a/backend/internal/service/sora_gateway_streaming_legacy.go b/backend/internal/service/sora_gateway_streaming_legacy.go
index 8a38f181..d399ba1c 100644
--- a/backend/internal/service/sora_gateway_streaming_legacy.go
+++ b/backend/internal/service/sora_gateway_streaming_legacy.go
@@ -316,7 +316,7 @@ func (s *SoraGatewayService) processSoraSSEData(data string, originalModel strin
 		}
 	}
 
-	updatedData, err := json.Marshal(payload)
+	updatedData, err := jsonMarshalRaw(payload)
 	if err != nil {
 		return "data: " + data, contentDelta, nil
 	}
@@ -484,7 +484,7 @@ func (s *SoraGatewayService) flushSoraRewriteBuffer(buffer string, originalModel
 	if originalModel != "" {
 		payload["model"] = originalModel
 	}
-	updatedData, err := json.Marshal(payload)
+	updatedData, err := jsonMarshalRaw(payload)
 	if err != nil {
 		return "", "", err
 	}