diff --git a/frameworks/native/backup_ext/src/tar_file.cpp b/frameworks/native/backup_ext/src/tar_file.cpp
index 33886e549d642afc23fd9b4d3dfe4bd211747923..c5117569c1032d437b8a55856a2f6e08c5eda0dd 100644
--- a/frameworks/native/backup_ext/src/tar_file.cpp
+++ b/frameworks/native/backup_ext/src/tar_file.cpp
@@ -213,34 +213,35 @@ bool TarFile::AddFile(string &fileName, const struct stat &st, bool isSplit)
 
 bool TarFile::WriteFileContent(const string &fileName, off_t size)
 {
-    int fd = open(fileName.c_str(), O_RDONLY | O_CLOEXEC);
-    if (fd < 0) {
+    FILE *fd = fopen(fileName.c_str(), "rb");
+    if (fd == nullptr) {
         HILOGE("Failed to open file %{public}s, err = %{public}d", fileName.data(), errno);
         return false;
     }
     off_t remain = size;
     bool isFilled = false;
+    vector<uint8_t> ioBuffer {};
+    off_t read = READ_BUFF_SIZE;
+    ioBuffer.resize(read);
 
     while (remain > 0) {
-        off_t read = ioBuffer_.size();
         if (remain < read) {
             read = remain;
         }
         // read buffer from src file
-        if (ReadAll(fd, ioBuffer_, read) != read) {
-            HILOGE("Failed to read all");
+        if (fread(&ioBuffer[0], sizeof(uint8_t), read, fd) != static_cast<size_t>(read)) {
+            HILOGE("Failed to split open filename.");
             break;
         }
-
         // write buffer to tar file
-        if (SplitWriteAll(ioBuffer_, read) != read) {
+        if (SplitWriteAll(ioBuffer, read) != read) {
             HILOGE("Failed to split write all");
             break;
         }
         remain -= read;
     }
 
-    close(fd);
+    (void)fclose(fd);
     if (remain == 0) {
         if (!isFilled) {
             return CompleteBlock(size);
@@ -261,12 +262,8 @@ off_t TarFile::SplitWriteAll(const vector<uint8_t> &ioBuffer, off_t read)
     while (count < len) {
         auto writeBytes = fwrite(&ioBuffer[count], sizeof(uint8_t), len - count, currentTarFile_);
         if (writeBytes < 1) {
-            // 再执行一遍
-            auto writeBytes = fwrite(&ioBuffer[count], sizeof(uint8_t), len - count, currentTarFile_);
-            if (writeBytes < 1) {
-                HILOGE("Failed to fwrite tar file, err = %{public}d", errno);
-                return count;
-            }
+            HILOGE("Failed to fwrite tar file, err = %{public}d", errno);
+            continue;
         }
         count += writeBytes;
         currentTarFileSize_ += writeBytes;
@@ -421,7 +418,7 @@ int TarFile::WriteAll(const vector<uint8_t> &buf, size_t len)
         auto i = fwrite(&buf[0] + count, sizeof(uint8_t), len - count, currentTarFile_);
         if (i < 1) {
             HILOGE("Failed to fwrite tar file, err = %{public}d", errno);
-            return count;
+            continue;
         }
         count += i;
         currentTarFileSize_ += i;