diff --git a/components/canvas/nodes/ImageNode.tsx b/components/canvas/nodes/ImageNode.tsx
index 51b3bad50..713dd225b 100644
--- a/components/canvas/nodes/ImageNode.tsx
+++ b/components/canvas/nodes/ImageNode.tsx
@@ -69,6 +69,10 @@ import {
 import type { DetailUiScreenOverlaySnapshot } from "@/lib/detail-ui-surface-adapter";
 import { buildImageProxyUrl } from "@/lib/image-delivery";
 import { inferOriginalImageUrl } from "@/lib/image-url";
+import {
+  getNodeContentScale,
+  getScaledNodeContentStyle,
+} from "@/lib/canvas/node-content-scale";
 import { cn } from "@/lib/utils";
 import type {
   CanvasTextEditPayloadItem,
@@ -350,6 +354,18 @@ interface ImageNodeProps {
 
 export function ImageNode({ node, isSelected }: ImageNodeProps) {
   const data = node.data as ImageNodeData;
+  const contentScale = useMemo(
+    () =>
+      getNodeContentScale(node.size, {
+        width: 220,
+        height: 220,
+      }),
+    [node.size.height, node.size.width]
+  );
+  const scaledContentStyle = useMemo(
+    () => getScaledNodeContentStyle(contentScale),
+    [contentScale]
+  );
   const detailProgressLabel =
     typeof data.metadata?.detailProgressLabel === "string"
       ? data.metadata.detailProgressLabel.trim()
@@ -2867,6 +2883,7 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
         onMouseLeave={() => setIsHovered(false)}
         ref={containerRef}
       >
+        <div className="relative h-full w-full" style={scaledContentStyle}>
         {/* 图片内容 - 使用 object-contain 保持原始比例 */}
         {data.src ? (
           <div className="relative h-full w-full">
@@ -3298,6 +3315,7 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
             快照 {shortAgentExecutionSnapshotId}
           </button>
         ) : null}
+        </div>
       </div>
 
       {/* 角度编辑对话框 */}
diff --git a/components/canvas/nodes/VideoNode.tsx b/components/canvas/nodes/VideoNode.tsx
index a20d46cfc..60c331b31 100644
--- a/components/canvas/nodes/VideoNode.tsx
+++ b/components/canvas/nodes/VideoNode.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import React, { useState, useRef } from "react";
+import React, { useMemo, useRef, useState } from "react";
 import { Video, Loader2, AlertCircle, MoreVertical, Download, Trash2, Play, Pause, Volume2, VolumeX } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import {
@@ -13,6 +13,10 @@ import {
 import { Slider } from "@/components/ui/slider";
 import { AgentExecutionSnapshotDialog } from "@/components/agents/AgentExecutionSnapshotDialog";
 import { toast } from "sonner";
+import {
+  getNodeContentScale,
+  getScaledNodeContentStyle,
+} from "@/lib/canvas/node-content-scale";
 import { useCanvasStore } from "@/store/canvas";
 import type { CanvasNode, VideoNodeData } from "@/types/canvas";
 import { cn } from "@/lib/utils";
@@ -24,6 +28,18 @@ interface VideoNodeProps {
 
 export function VideoNode({ node, isSelected }: VideoNodeProps) {
   const data = node.data as VideoNodeData;
+  const contentScale = useMemo(
+    () =>
+      getNodeContentScale(node.size, {
+        width: 240,
+        height: 220,
+      }),
+    [node.size.height, node.size.width]
+  );
+  const scaledContentStyle = useMemo(
+    () => getScaledNodeContentStyle(contentScale),
+    [contentScale]
+  );
   const agentExecutionSnapshotId =
     typeof data.metadata?.agentExecutionSnapshotId === "string"
       ? data.metadata.agentExecutionSnapshotId.trim()
@@ -146,6 +162,7 @@ export function VideoNode({ node, isSelected }: VideoNodeProps) {
       onMouseEnter={() => setIsHovered(true)}
       onMouseLeave={() => setIsHovered(false)}
     >
+      <div className="relative h-full w-full" style={scaledContentStyle}>
       {/* 视频内容 */}
       {data.src ? (
         <div className="relative w-full h-full">
@@ -306,6 +323,7 @@ export function VideoNode({ node, isSelected }: VideoNodeProps) {
           <p className="line-clamp-2 text-xs leading-5 text-[#556072]">{data.prompt}</p>
         </div>
       )}
+      </div>
     </div>
   );
 }
diff --git a/components/canvas/nodes/WorkflowNode.tsx b/components/canvas/nodes/WorkflowNode.tsx
index 1cc264660..779fef9f7 100644
--- a/components/canvas/nodes/WorkflowNode.tsx
+++ b/components/canvas/nodes/WorkflowNode.tsx
@@ -13,6 +13,10 @@ import {
 import { Badge } from "@/components/ui/badge";
 import { useCanvasStore } from "@/store/canvas";
 import { cn } from "@/lib/utils";
+import {
+  getNodeContentScale,
+  getScaledNodeContentStyle,
+} from "@/lib/canvas/node-content-scale";
 import {
   getVideoWorkflowNodeDefinition,
   getVideoWorkflowQuickConnectOutputs,
@@ -131,6 +135,14 @@ export function WorkflowNode({ node, isSelected }: WorkflowNodeProps) {
   const deleteNode = useCanvasStore((state) => state.deleteNode);
   const data = node.data as WorkflowNodeData;
   const definition = getVideoWorkflowNodeDefinition(data.templateType);
+  const contentScale = getNodeContentScale(
+    node.size,
+    definition?.size || {
+      width: 300,
+      height: 180,
+    }
+  );
+  const scaledContentStyle = getScaledNodeContentStyle(contentScale);
   const metadata = (data.metadata || {}) as Record<string, any>;
   const quickConnectOutputs =
     data.templateType && definition
@@ -257,7 +269,8 @@ export function WorkflowNode({ node, isSelected }: WorkflowNodeProps) {
         style={{ backgroundColor: accentBarColor }}
       />
 
-      <div className="flex h-full flex-col gap-3 p-3">
+      <div className="h-full w-full" style={scaledContentStyle}>
+        <div className="flex h-full flex-col gap-3 p-3">
         <div
           className="rounded-[20px] border px-3 py-3"
           style={{
@@ -385,12 +398,13 @@ export function WorkflowNode({ node, isSelected }: WorkflowNodeProps) {
                 {item.label}
               </span>
             ))
-          ) : (
+        ) : (
             <span className="rounded-full border border-dashed border-[#d8def0] px-2.5 py-1 text-[11px] text-[#6f7483] dark:border-zinc-800">
               结束节点
             </span>
           )}
         </div>
+        </div>
       </div>
     </div>
   );
diff --git a/lib/canvas/node-content-scale.ts b/lib/canvas/node-content-scale.ts
new file mode 100644
index 000000000..f05f17e3d
--- /dev/null
+++ b/lib/canvas/node-content-scale.ts
@@ -0,0 +1,33 @@
+import type { CSSProperties } from "react";
+import type { Size } from "@/types/canvas";
+
+const DEFAULT_MIN_SCALE = 0.56;
+
+export function getNodeContentScale(
+  size: Size,
+  baseSize: Size,
+  minScale = DEFAULT_MIN_SCALE
+) {
+  if (!size.width || !size.height || !baseSize.width || !baseSize.height) {
+    return 1;
+  }
+
+  const widthScale = size.width / baseSize.width;
+  const heightScale = size.height / baseSize.height;
+  return Math.min(1, Math.max(minScale, Math.min(widthScale, heightScale)));
+}
+
+export function getScaledNodeContentStyle(
+  scale: number
+): CSSProperties | undefined {
+  if (scale >= 0.999) {
+    return undefined;
+  }
+
+  return {
+    width: `${100 / scale}%`,
+    height: `${100 / scale}%`,
+    transform: `scale(${scale})`,
+    transformOrigin: "top left",
+  };
+}