diff --git a/business/jxstore/knowledge/knowledge.go b/business/jxstore/knowledge/knowledge.go
index 239779632..5ca6634ee 100644
--- a/business/jxstore/knowledge/knowledge.go
+++ b/business/jxstore/knowledge/knowledge.go
@@ -42,14 +42,14 @@ type SNSUploadImgResult struct {
 
 func SNSUploadImg(ctx *jxcontext.Context, files []*multipart.FileHeader, isThumb bool) (snsUploadImgResult *SNSUploadImgResult, err error) {
 	var (
-		data       = []byte{}
 		fileHeader = files[0]
 		fileName   = fileHeader.Filename
+		data       = make([]byte, fileHeader.Size)
 	)
 	snsUploadImgResult = &SNSUploadImgResult{}
 	file, err := fileHeader.Open()
 	file.Read(data)
-	defer file.Close()
+	fmt.Println("data", data)
 	if len(data) == 0 {
 		return snsUploadImgResult, fmt.Errorf("未读取到文件！")
 	}
@@ -65,6 +65,7 @@ func SNSUploadImg(ctx *jxcontext.Context, files []*multipart.FileHeader, isThumb
 			snsUploadImgResult.MediaID = mediaID
 		}
 	}
+	file.Close()
 	return snsUploadImgResult, err
 }