diff --git a/backend-java/src/main/java/com/nanri/aiimage/modules/brand/model/dto/BrandCrawlResultFileDto.java b/backend-java/src/main/java/com/nanri/aiimage/modules/brand/model/dto/BrandCrawlResultFileDto.java
index 79804db..4aed94b 100644
--- a/backend-java/src/main/java/com/nanri/aiimage/modules/brand/model/dto/BrandCrawlResultFileDto.java
+++ b/backend-java/src/main/java/com/nanri/aiimage/modules/brand/model/dto/BrandCrawlResultFileDto.java
@@ -19,7 +19,7 @@ public class BrandCrawlResultFileDto {
     @Schema(description = "原始文件名。为空时会回退使用任务创建时记录的 originalFilename。")
     private String originalFilename;
 
-    @Schema(description = "相对路径。文件夹上传场景下用于生成 zip 时恢复目录层级。")
+    @Schema(description = "相对路径。创建任务时可传；当前仅用于记录来源信息，最终 zip 不再恢复目录层级。")
     private String relativePath;
 
     @Schema(description = "主 sheet 名称。为空时默认输出为 Sheet1。")
diff --git a/backend-java/src/main/java/com/nanri/aiimage/modules/brand/service/BrandTaskService.java b/backend-java/src/main/java/com/nanri/aiimage/modules/brand/service/BrandTaskService.java
index 5b5192c..db1f4ff 100644
--- a/backend-java/src/main/java/com/nanri/aiimage/modules/brand/service/BrandTaskService.java
+++ b/backend-java/src/main/java/com/nanri/aiimage/modules/brand/service/BrandTaskService.java
@@ -267,10 +267,11 @@ public class BrandTaskService {
                 if (cachedFile == null) {
                     throw new BusinessException("缺少原始缓存数据: " + resultFile.getFileUrl());
                 }
-                String originalFilename = blankToDefault(resultFile.getOriginalFilename(), sourceFile.getOriginalFilename());
+                File sourceLocalFile = resolveSourceFile(sourceFile);
+                String originalFilename = resolveOriginalFilename(sourceFile, sourceLocalFile);
                 File outputFile = buildNamedOutputFile(outputDir, buildResultFilename(originalFilename));
                 writeBrandWorkbook(outputFile, request.getStrategy(), cachedFile, resultFile);
-                outputEntries.add(new OutputEntry(blankToNull(resultFile.getRelativePath()), outputFile));
+                outputEntries.add(new OutputEntry(sourceLocalFile, originalFilename, outputFile, outputFile.getName()));
             }
 
             brandTaskProgressCacheService.updatePhase(taskId, BrandTaskProgressCacheService.PHASE_UPLOADING, finishedCount, totalCount);
@@ -830,43 +831,26 @@ public class BrandTaskService {
         }
         List<String> urls = new ArrayList<>();
         for (OutputEntry entry : entries) {
-            String objectKey = ossStorageService.uploadResultFile(entry.file(), "BRAND");
+            String objectKey = ossStorageService.uploadResultFile(entry.resultFile(), "BRAND");
             urls.add(ossStorageService.generateDownloadUrl(objectKey));
         }
         Map<String, Object> result = new LinkedHashMap<>();
         result.put("urls", urls);
-        if (entries.size() > 1) {
-            File zipFile = packageAsZip(taskId, entries);
-            String zipObjectKey = ossStorageService.uploadResultFile(zipFile, "BRAND");
-            result.put("zip_url", ossStorageService.generateDownloadUrl(zipObjectKey));
-        }
+        File zipFile = packageAsZip(taskId, entries);
+        String zipObjectKey = ossStorageService.uploadResultFile(zipFile, "BRAND");
+        result.put("zip_url", ossStorageService.generateDownloadUrl(zipObjectKey));
         return result;
     }
 
     private File packageAsZip(Long taskId, List<OutputEntry> entries) throws IOException {
         File zipDir = FileUtil.mkdir(FileUtil.file(storageProperties.getLocalTempDir(), "brand-result", String.valueOf(taskId)));
         File zipFile = buildNamedOutputFile(zipDir, "brand_task_" + taskId + ".zip");
+        Set<String> zipEntryNames = new LinkedHashSet<>();
         try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFile))) {
             byte[] buffer = new byte[8192];
             for (OutputEntry entry : entries) {
-                String relativePath = blankToNull(entry.relativePath());
-                String entryName;
-                if (relativePath != null) {
-                    String relativeParent = relativePath.replace('\\', '/');
-                    int slashIndex = relativeParent.lastIndexOf('/');
-                    String prefix = slashIndex >= 0 ? relativeParent.substring(0, slashIndex + 1) : "";
-                    entryName = prefix + entry.file().getName();
-                } else {
-                    entryName = entry.file().getName();
-                }
-                zos.putNextEntry(new ZipEntry(entryName));
-                try (FileInputStream inputStream = new FileInputStream(entry.file())) {
-                    int len;
-                    while ((len = inputStream.read(buffer)) > 0) {
-                        zos.write(buffer, 0, len);
-                    }
-                }
-                zos.closeEntry();
+                writeZipEntry(zos, buffer, entry.sourceFile(), buildSourceZipEntry(entry.sourceFilename()), zipEntryNames);
+                writeZipEntry(zos, buffer, entry.resultFile(), buildResultZipEntry(entry.resultFilename()), zipEntryNames);
             }
         }
         return zipFile;
@@ -890,6 +874,41 @@ public class BrandTaskService {
         }
     }
 
+    private void writeZipEntry(ZipOutputStream zos,
+                               byte[] buffer,
+                               File file,
+                               String entryName,
+                               Set<String> zipEntryNames) throws IOException {
+        if (!zipEntryNames.add(entryName)) {
+            throw new BusinessException("压缩包中存在重复文件名: " + entryName);
+        }
+        zos.putNextEntry(new ZipEntry(entryName));
+        try (FileInputStream inputStream = new FileInputStream(file)) {
+            int len;
+            while ((len = inputStream.read(buffer)) > 0) {
+                zos.write(buffer, 0, len);
+            }
+        }
+        zos.closeEntry();
+    }
+
+    private String buildSourceZipEntry(String sourceFilename) {
+        return "源文件/" + normalizeZipFilename(sourceFilename);
+    }
+
+    private String buildResultZipEntry(String resultFilename) {
+        return "结果文件/" + normalizeZipFilename(resultFilename);
+    }
+
+    private String normalizeZipFilename(String filename) {
+        String normalized = blankToDefault(filename, "brand.xlsx").replace('\\', '/');
+        int slashIndex = normalized.lastIndexOf('/');
+        if (slashIndex >= 0) {
+            normalized = normalized.substring(slashIndex + 1);
+        }
+        return normalized;
+    }
+
     private String buildResultFilename(String originalFilename) {
         String sourceName = blankToDefault(originalFilename, "brand.xlsx");
         return FileUtil.mainName(sourceName) + "_result.xlsx";
@@ -1020,6 +1039,6 @@ public class BrandTaskService {
                                    List<String> uniqueBrands) {
     }
 
-    private record OutputEntry(String relativePath, File file) {
+    private record OutputEntry(File sourceFile, String sourceFilename, File resultFile, String resultFilename) {
     }
 }