diff --git a/.idea/.gitignore b/.idea/.gitignore
index 26d3352..0ee0a9a 100644
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@@ -1,3 +1,4 @@
 # Default ignored files
 /shelf/
 /workspace.xml
+CopilotChatHistory.xml
diff --git a/src/main/java/com/imyeyu/server/modules/system/controller/FileController.java b/src/main/java/com/imyeyu/server/modules/system/controller/FileController.java
index 0a3ebbd..ee818b3 100644
--- a/src/main/java/com/imyeyu/server/modules/system/controller/FileController.java
+++ b/src/main/java/com/imyeyu/server/modules/system/controller/FileController.java
@@ -23,12 +23,15 @@ import com.imyeyu.server.modules.system.task.async.FileUnZipAsyncTask;
 import com.imyeyu.server.modules.system.task.async.FileZipAsyncTask;
 import com.imyeyu.server.modules.system.util.ResourceHandler;
 import com.imyeyu.server.modules.system.vo.ListFileToRequest;
+import com.imyeyu.spring.TimiSpring;
 import com.imyeyu.spring.annotation.AOPLog;
 import com.imyeyu.spring.annotation.IgnoreGlobalReturn;
 import com.imyeyu.spring.annotation.RequestRateLimit;
+import com.imyeyu.spring.bean.RequestRange;
 import com.imyeyu.utils.OS;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
+import lombok.Cleanup;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import net.coobird.thumbnailator.Thumbnails;
@@ -47,6 +50,7 @@ import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.RandomAccessFile;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -195,6 +199,7 @@ public class FileController implements TimiJava, OS.FileSystem {
 				resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
 				return;
 			}
+			resp.setContentLengthLong(Files.size(filePath));
 			String mimeType = new Tika().detect(filePath);
 			if (TimiJava.isNotEmpty(mimeType)) {
 				resp.setContentType(mimeType);
@@ -452,27 +457,41 @@ public class FileController implements TimiJava, OS.FileSystem {
 	/**
 	 * 下载文件
 	 *
-	 * @param req  请求对象
-	 * @param resp 回调对象
+	 * @param resp 返回对象
 	 */
 	@AOPLog
 	@RequestRateLimit
 	@IgnoreGlobalReturn
 	@RequestMapping("/download/**")
-	public void download(HttpServletRequest req, HttpServletResponse resp) {
+	public void download(HttpServletResponse resp) {
 		try {
-			String path = req.getServletPath().substring("/system/file/download".length());
+			String path = TimiSpring.cutURIStartAt("/system/file/download");
 			path = settingService.getAsString(SettingKey.SYSTEM_FILE_BASE) + path;
 			File file = new File(path);
 			service.checkAccessPermission(file.getAbsolutePath());
+
 			String mimeType = new Tika().detect(file);
 			resp.setContentType(mimeType);
 			resp.setHeader("Content-Disposition", Network.getFileDownloadHeader(file.getName()));
-			resp.setHeader("Content-Range", String.valueOf(file.length() - 1));
 			resp.setHeader("Accept-Ranges", "bytes");
-			resp.setContentLengthLong(file.length());
-			IO.toOutputStream(resp.getOutputStream(), file);
-			resp.flushBuffer();
+
+			RequestRange range = TimiSpring.requestRange(file.length());
+			if (range == null) {
+				// 完整文件
+				resp.setContentLengthLong(file.length());
+				resp.setStatus(HttpServletResponse.SC_OK);
+				IO.toOutputStream(resp.getOutputStream(), file);
+			} else {
+				// 分片文件
+				resp.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
+				resp.setHeader("Content-Range", "bytes %s-%s/%s".formatted(range.getStart(), range.getEnd(), file.length()));
+				resp.setContentLengthLong(range.getLength());
+
+				@Cleanup
+				RandomAccessFile raf = new RandomAccessFile(file, "r");
+				raf.seek(range.getStart());
+				IO.toOutputStream(resp.getOutputStream(), raf, range.getStart(), range.getLength());
+			}
 		} catch (Exception e) {
 			log.error("download error", e);
 			resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);