diff --git a/frontend/app/features/platform/DataResourceUploadModal.tsx b/frontend/app/features/platform/DataResourceUploadModal.tsx
index c5bea16..0d94dda 100644
--- a/frontend/app/features/platform/DataResourceUploadModal.tsx
+++ b/frontend/app/features/platform/DataResourceUploadModal.tsx
@@ -7,6 +7,7 @@ import {
   dialogSecondaryButtonClass,
 } from "~/components/common/AppFormDialog";
 import { Button } from "~/components/ui/button";
+import { fileVisualFromName } from "./WorkspaceTree";
 import {
   formFieldClass,
   formHintClass,
@@ -52,6 +53,8 @@ export function DataResourceUploadModal({
   const finalPath = finalTarget
     ? `${finalTarget}/${file?.name ?? ""}`
     : file?.name ?? "";
+  const fileVisual = fileVisualFromName(file?.name ?? resourceName);
+  const FileIcon = fileVisual.Icon;
 
   return (
     <AppFormDialog
@@ -65,8 +68,13 @@ export function DataResourceUploadModal({
       <form className={modalFormClass} onSubmit={onSubmit}>
         <label className={formFieldClass}>
           <span>已选文件</span>
-          <div className="font-normal text-[#283a4e]">
-            {file ? file.name : "未选择文件"}
+          <div className="flex items-center gap-2.5 font-normal text-[#283a4e]">
+            <span
+              className={`grid size-[25px] shrink-0 place-items-center rounded-[5px] ${fileVisual.tone}`}
+            >
+              <FileIcon size={17} />
+            </span>
+            <span className="min-w-0 truncate">{file ? file.name : "未选择文件"}</span>
           </div>
         </label>
         <label className={formFieldClass}>
@@ -75,7 +83,7 @@ export function DataResourceUploadModal({
             className={formInputClass}
             autoFocus
             maxLength={255}
-            placeholder="例如：训练数据"
+            placeholder="例如：训练数据.csv"
             value={resourceName}
             onChange={(event) => onNameChange(event.target.value)}
             required
diff --git a/frontend/app/features/platform/WorkspaceTree.tsx b/frontend/app/features/platform/WorkspaceTree.tsx
index 39da436..61a0858 100644
--- a/frontend/app/features/platform/WorkspaceTree.tsx
+++ b/frontend/app/features/platform/WorkspaceTree.tsx
@@ -5,8 +5,13 @@ import {
   ChevronRight,
   Database,
   FileCode,
+  FileJson,
+  FileSpreadsheet,
+  FileText,
+  FileType,
   Folder,
   Lock,
+  Table2,
   type LucideIcon,
 } from "lucide-react";
 import type {
@@ -50,6 +55,11 @@ type WorkspaceTreeItemsProps = Omit<WorkspaceTreeProps, "title" | "readOnly"> &
   onCopyResourcePath?: (jupyterPath: string) => void;
 };
 
+export type FileVisual = {
+  Icon: LucideIcon;
+  tone: string;
+};
+
 function formatTime(value: string) {
   return new Intl.DateTimeFormat("zh-CN", {
     month: "2-digit",
@@ -64,6 +74,36 @@ export function scriptIcon(item: Pick<ScriptItem, "script_type">): LucideIcon {
   return item.script_type === "notebook" ? BookOpen : FileCode;
 }
 
+/** 按文件名后缀返回树节点图标与配色（脚本 + 数据资源共用）。 */
+export function fileVisualFromName(
+  name: string,
+  scriptType?: ScriptItem["script_type"],
+): FileVisual {
+  const lower = name.toLowerCase();
+  if (scriptType === "notebook" || lower.endsWith(".ipynb")) {
+    return { Icon: BookOpen, tone: "text-[#e15e50] bg-[#fff0ed]" };
+  }
+  if (scriptType === "python" || lower.endsWith(".py")) {
+    return { Icon: FileCode, tone: "text-[#2e73c6] bg-[#eaf3ff]" };
+  }
+  if (lower.endsWith(".csv") || lower.endsWith(".tsv")) {
+    return { Icon: Table2, tone: "text-[#2f8f7b] bg-[#eaf8f4]" };
+  }
+  if (lower.endsWith(".xlsx") || lower.endsWith(".xls")) {
+    return { Icon: FileSpreadsheet, tone: "text-[#3d8f5a] bg-[#eef8f1]" };
+  }
+  if (lower.endsWith(".json")) {
+    return { Icon: FileJson, tone: "text-[#b07a1a] bg-[#fff8e8]" };
+  }
+  if (lower.endsWith(".parquet")) {
+    return { Icon: Database, tone: "text-[#4a6fa5] bg-[#eef3fa]" };
+  }
+  if (lower.endsWith(".txt")) {
+    return { Icon: FileText, tone: "text-[#6b7c8f] bg-[#f2f5f8]" };
+  }
+  return { Icon: FileType, tone: "text-[#5a8f6a] bg-[#eef8f1]" };
+}
+
 function ownedScriptPath(item: ScriptItem) {
   // 数据资源的 relative_path 已经是 jupyter 路径（无 ULID 前缀）；脚本相对路径形如
   // `{ulid}/{ws_id}/{user_id}/...`，需要剥前两层。
@@ -98,25 +138,33 @@ export function WorkspaceTreeGroup({
   const open = expandedPaths.has(groupKey);
   const dataResourceScripts = useMemo(() => {
     if (!dataResources) return [];
-    return dataResources.map((r) => ({
-      script_id: `data:${r.resource_id}`,
-      workspace_id: r.workspace_id,
-      current_object_id: r.storage_object_id,
-      owner_user_id: r.owner_user_id,
-      owner_display_name: null,
-      script_name: r.resource_name,
-      script_type: "python" as const,
-      visibility: r.visibility,
-      status: r.status,
-      is_locked: false,
-      // relative_path 直接是 jupyter 路径（与 Python/Notebook 同层渲染，不再带虚拟前缀）
-      relative_path: r.jupyter_accessible_path,
-      jupyter_path: r.jupyter_accessible_path,
-      content_hash: r.file.content_hash ?? "",
-      size_bytes: r.file.size_bytes,
-      created_at: r.created_at,
-      updated_at: r.updated_at,
-    } as unknown as ScriptItem));
+    return dataResources.map((r) => {
+      const ext = r.file.file_extension;
+      const name = r.resource_name;
+      const displayName =
+        ext && !name.toLowerCase().endsWith(ext.toLowerCase())
+          ? `${name}${ext}`
+          : name;
+      return {
+        script_id: `data:${r.resource_id}`,
+        workspace_id: r.workspace_id,
+        current_object_id: r.storage_object_id,
+        owner_user_id: r.owner_user_id,
+        owner_display_name: null,
+        script_name: displayName,
+        script_type: "python" as const,
+        visibility: r.visibility,
+        status: r.status,
+        is_locked: false,
+        // relative_path 直接是 jupyter 路径（与 Python/Notebook 同层渲染，不再带虚拟前缀）
+        relative_path: r.jupyter_accessible_path,
+        jupyter_path: r.jupyter_accessible_path,
+        content_hash: r.file.content_hash ?? "",
+        size_bytes: r.file.size_bytes,
+        created_at: r.created_at,
+        updated_at: r.updated_at,
+      } as unknown as ScriptItem;
+    });
   }, [dataResources]);
 
   const dataResourceDirectories = useMemo(() => {
@@ -250,12 +298,10 @@ function WorkspaceTreeItems({
       {childScripts.map((item) => {
         const isActive = selectedId === item.script_id;
         const isData = item.script_id.startsWith("data:");
-        const ItemIcon = isData ? Database : scriptIcon(item);
-        const iconTone = isData
-          ? "text-[#5a8f6a] bg-[#eef8f1]"
-          : item.script_type === "notebook"
-            ? "text-[#e15e50] bg-[#fff0ed]"
-            : "text-[#2e73c6] bg-[#eaf3ff]";
+        const { Icon: ItemIcon, tone: iconTone } = fileVisualFromName(
+          item.script_name,
+          isData ? undefined : item.script_type,
+        );
         return (
           <button
             className={`flex h-[47px] w-full cursor-pointer items-center gap-2 rounded-md border pr-[9px] text-left ${
diff --git a/frontend/app/features/platform/state/uiStore.ts b/frontend/app/features/platform/state/uiStore.ts
index 465df93..3c44b83 100644
--- a/frontend/app/features/platform/state/uiStore.ts
+++ b/frontend/app/features/platform/state/uiStore.ts
@@ -251,7 +251,7 @@ export const useUiStore = create<UiState>((set) => ({
         open: true,
         file,
         parentPath,
-        resourceName: file.name.replace(/\.[^/.]+$/, ""),
+        resourceName: file.name,
         visibility: "workspace",
         description: "",
         uploading: false,