diff --git a/ios/RNAliyunOSS+MULTIPARTUPLOAD.m b/ios/RNAliyunOSS+MULTIPARTUPLOAD.m
index aff497f..ac71a6f 100644
--- a/ios/RNAliyunOSS+MULTIPARTUPLOAD.m
+++ b/ios/RNAliyunOSS+MULTIPARTUPLOAD.m
@@ -38,7 +38,11 @@ @implementation RNAliyunOSS (MULTIPARTUPLOAD)
  */
 RCT_REMAP_METHOD(multipartUpload, withBucketName:(NSString *)bucketName objectKey:(NSString *)objectKey uploadId:(NSString*)uploadId withFilePath:(NSString*)filePath  options:(NSDictionary*)options resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject){
     __block NSMutableArray * partInfos = [NSMutableArray new];
-    filePath = [NSHomeDirectory() stringByAppendingPathComponent:filePath];
+    if ([filePath rangeOfString:NSHomeDirectory()].location == NSNotFound) {
+        filePath = [NSHomeDirectory() stringByAppendingPathComponent:filePath];
+    }
+    filePath = [filePath stringByReplacingOccurrencesOfString:@"file://" withString:@""];
+    
     //分片上传数量
     int chuckCount = 2;
     //获取文件大小
@@ -58,7 +62,15 @@ @implementation RNAliyunOSS (MULTIPARTUPLOAD)
         uploadPart.partNumber = i; // part number start from 1
         NSFileHandle* readHandle = [NSFileHandle fileHandleForReadingAtPath:filePath];
         [readHandle seekToFileOffset:offset * (i -1)];
-        NSData* data = [readHandle readDataOfLength:offset];
+        NSData* data;
+        if (i == chuckCount)
+        {
+            NSUInteger lastLength = offset + fileSize % chuckCount;
+            data = [readHandle readDataOfLength:lastLength];
+        }else
+        {
+            data = [readHandle readDataOfLength:offset];
+        }
         uploadPart.uploadPartData = data;
         OSSTask * uploadPartTask = [self.client uploadPart:uploadPart];
         [uploadPartTask waitUntilFinished];