diff --git a/src/tdtmap/tdtmap.controller.ts b/src/tdtmap/tdtmap.controller.ts
index 27276cc..13fb33e 100644
--- a/src/tdtmap/tdtmap.controller.ts
+++ b/src/tdtmap/tdtmap.controller.ts
@@ -70,6 +70,7 @@ export class TdtmapController {
       // minio 中存在，从 minio 取出
       const dbItem:Buffer = await this.tdtmapService.getTileFromLocal(tileFormattedName) // 从 minio 取出来
       cacheMap.set(tileFormattedName, dbItem)
+      Buffer.from(dbItem as any, 'utf-8')
       return new StreamableFile(dbItem);
     } else {
       // 如果本地数据库都不存在
@@ -85,7 +86,6 @@ export class TdtmapController {
         cacheMap.set(tileFormattedName, res.data)
         const saveSuccess = await this.tdtmapService.setTileToLocal(tileFormattedName, res.data);
         if (saveSuccess) bloomFilter.add(tileFormattedName);
-        
         Buffer.from(res.data, 'utf-8')
         return new StreamableFile(res.data); // 请求成功
       } else {
diff --git a/src/tdtmap/tdtmap.service.ts b/src/tdtmap/tdtmap.service.ts
index 697beb5..19f8166 100644
--- a/src/tdtmap/tdtmap.service.ts
+++ b/src/tdtmap/tdtmap.service.ts
@@ -30,10 +30,12 @@ export class TdtmapService {
   async getTileFromLocal(tile_name:string):Promise<Buffer> {
     return new Promise(async (resolve, reject) => {
       const stream = await this.minioClient.getObject("nestfiles", tile_name)
-      let res:any = null
-      stream.on("data", (data) => { res = data })
+      const res:any[] = []
+      stream.on("data", (data:Buffer) => {
+        if (Buffer.isBuffer(data)) res.push(data)
+      })
       stream.on("end", () => {
-        if (res) resolve(res)
+        if (res.length > 0) resolve(Buffer.concat(res))
         else reject()
       })
       stream.on("error", () => { reject() })