diff --git a/web/src/components/canvas/canvas-node.tsx b/web/src/components/canvas/canvas-node.tsx
index 6445f2741..816e69bba 100644
--- a/web/src/components/canvas/canvas-node.tsx
+++ b/web/src/components/canvas/canvas-node.tsx
@@ -43,6 +43,7 @@ type CanvasNodeProps = {
     batchClosing?: boolean;
     batchOpening?: boolean;
     batchRecovering?: boolean;
+    batchPrimary?: boolean;
     batchMotion?: { x: number; y: number; index: number };
     onMouseDown: (event: React.MouseEvent, nodeId: string) => void;
     onHoverStart: (nodeId: string) => void;
@@ -108,6 +109,7 @@ export const CanvasNode = React.memo(function CanvasNode({
     batchClosing = false,
     batchOpening = false,
     batchRecovering = false,
+    batchPrimary = false,
     batchMotion,
     onMouseDown,
     onHoverStart,
@@ -461,7 +463,7 @@ export const CanvasNode = React.memo(function CanvasNode({
                         {resourceLabel ? <ResourceLabelBadge reference={resourceLabel} theme={theme} /> : null}
                         {hasMediaContent && !readOnly ? <ResourceStorageBadge storageKey={data.metadata?.storageKey} active={isActive} theme={theme} /> : null}
                         {isBatchRoot ? <BatchToggleBadge count={batchCount} expanded={batchExpanded} theme={theme} onToggle={() => onToggleBatch?.(data.id)} /> : null}
-                        {isBatchChild && !readOnly ? <BatchPrimaryBadge visible={hovered || isSelected} theme={theme} onSelect={() => onSetBatchPrimary?.(data)} /> : null}
+                        {isBatchChild && !readOnly ? <BatchPrimaryBadge visible={batchPrimary || hovered || isSelected} selected={batchPrimary} theme={theme} onSelect={() => onSetBatchPrimary?.(data)} /> : null}
                         {data.metadata?.locked ? <NodeLockBadge theme={theme} /> : null}
                     </div>
                 ) : null}
@@ -802,11 +804,11 @@ function BatchToggleBadge({ count, expanded, theme, onToggle }: { count: number;
     );
 }
 
-function BatchPrimaryBadge({ visible, theme, onSelect }: { visible: boolean; theme: CanvasTheme; onSelect: () => void }) {
+function BatchPrimaryBadge({ visible, selected, theme, onSelect }: { visible: boolean; selected: boolean; theme: CanvasTheme; onSelect: () => void }) {
     return (
-        <button type="button" className={`canvas-node-tool-button inline-flex h-7 shrink-0 items-center gap-1 rounded-md border px-2 text-[10px] font-medium backdrop-blur-md transition-opacity ${visible ? "opacity-100" : "pointer-events-none opacity-0"}`} style={{ background: theme.toolbar.panel, borderColor: theme.toolbar.border, color: theme.node.text }} onClick={(event) => { event.stopPropagation(); onSelect(); }} onMouseDown={(event) => event.stopPropagation()} onPointerDown={(event) => event.stopPropagation()}>
-            <Star className="size-3" style={{ color: theme.accent.primary }} />
-            主图
+        <button type="button" className={`canvas-node-tool-button inline-flex h-7 shrink-0 items-center gap-1 rounded-md border px-2 text-[10px] font-medium backdrop-blur-md transition-opacity ${visible ? "opacity-100" : "pointer-events-none opacity-0"}`} style={{ background: theme.toolbar.panel, borderColor: selected ? theme.accent.primary : theme.toolbar.border, color: selected ? theme.accent.primary : theme.node.text }} aria-label={selected ? "当前主图" : "设置为主图"} aria-pressed={selected} onClick={(event) => { event.stopPropagation(); onSelect(); }} onMouseDown={(event) => event.stopPropagation()} onPointerDown={(event) => event.stopPropagation()}>
+            <Star className={`size-3 ${selected ? "fill-current" : ""}`} style={{ color: theme.accent.primary }} />
+            {selected ? "当前主图" : "主图"}
         </button>
     );
 }
diff --git a/web/src/lib/canvas/canvas-project-domain.ts b/web/src/lib/canvas/canvas-project-domain.ts
index c6a2ed635..f728d5ee9 100644
--- a/web/src/lib/canvas/canvas-project-domain.ts
+++ b/web/src/lib/canvas/canvas-project-domain.ts
@@ -296,6 +296,30 @@ export function sameNodeSemanticData(left: CanvasNodeData, right: CanvasNodeData
     return left.id === right.id && left.type === right.type && left.title === right.title && left.parentId === right.parentId && left.width === right.width && left.height === right.height && left.metadata === right.metadata;
 }
 
+export function applyBatchPrimaryImage(root: CanvasNodeData, primary: CanvasNodeData): CanvasNodeData {
+    // 主图是根节点对媒体的完整代理；可选字段也必须显式覆盖，避免残留上一张图的存储身份。
+    return {
+        ...root,
+        width: primary.width,
+        height: primary.height,
+        metadata: {
+            ...root.metadata,
+            primaryImageId: primary.id,
+            content: primary.metadata?.content,
+            storageKey: primary.metadata?.storageKey,
+            status: primary.metadata?.status,
+            naturalWidth: primary.metadata?.naturalWidth,
+            naturalHeight: primary.metadata?.naturalHeight,
+            bytes: primary.metadata?.bytes,
+            mimeType: primary.metadata?.mimeType,
+            errorDetails: primary.metadata?.errorDetails,
+            generationErrorCode: primary.metadata?.generationErrorCode,
+            failedPromptFingerprint: primary.metadata?.failedPromptFingerprint,
+            freeResize: primary.metadata?.freeResize,
+        },
+    };
+}
+
 export function removeCanvasNodes(nodes: CanvasNodeData[], requestedIds: Set<string>) {
     const removedIds = new Set(requestedIds);
     nodes.forEach((node) => {
@@ -327,17 +351,8 @@ export function removeCanvasNodes(nodes: CanvasNodeData[], requestedIds: Set<str
         if (!cleaned.metadata?.isBatchRoot || childIds?.length === cleaned.metadata.batchChildIds?.length) return cleaned;
         const primaryImageId = childIds?.includes(cleaned.metadata.primaryImageId || "") ? cleaned.metadata.primaryImageId : childIds?.[0];
         const primaryNode = remainingNodes.find((item) => item.id === primaryImageId);
-        return {
-            ...cleaned,
-            metadata: {
-                ...cleaned.metadata,
-                batchChildIds: childIds,
-                primaryImageId,
-                content: primaryNode?.metadata?.content || cleaned.metadata?.content,
-                naturalWidth: primaryNode?.metadata?.naturalWidth || cleaned.metadata?.naturalWidth,
-                naturalHeight: primaryNode?.metadata?.naturalHeight || cleaned.metadata?.naturalHeight,
-            },
-        };
+        const batchRoot = { ...cleaned, metadata: { ...cleaned.metadata, batchChildIds: childIds, primaryImageId } };
+        return primaryNode ? applyBatchPrimaryImage(batchRoot, primaryNode) : batchRoot;
     });
     return { removedIds, nodes: nextNodes };
 }
diff --git a/web/src/pages/canvas/canvas-project-world-layers.tsx b/web/src/pages/canvas/canvas-project-world-layers.tsx
index 83b3637da..41a754e9d 100644
--- a/web/src/pages/canvas/canvas-project-world-layers.tsx
+++ b/web/src/pages/canvas/canvas-project-world-layers.tsx
@@ -127,6 +127,7 @@ export function CanvasProjectWorldLayers(props: CanvasProjectWorldLayersProps) {
                         batchClosing={Boolean(node.metadata?.batchRootId && props.collapsingBatchIds.has(node.metadata.batchRootId))}
                         batchOpening={props.openingBatchIds.has(node.id)}
                         batchRecovering={props.collapsingBatchIds.has(node.id)}
+                        batchPrimary={Boolean(node.metadata?.batchRootId && props.nodeById.get(node.metadata.batchRootId)?.metadata?.primaryImageId === node.id)}
                         batchMotion={props.batchMotionById.get(node.id)}
                         showImageInfo={props.showImageInfo}
                         reduceMediaEffects={props.reduceMediaEffects || props.isNodeDragging || props.mediaEffectsDisabledNodeId === node.id}
diff --git a/web/src/pages/canvas/use-canvas-node-editor.ts b/web/src/pages/canvas/use-canvas-node-editor.ts
index 6cd12f76e..de8b43267 100644
--- a/web/src/pages/canvas/use-canvas-node-editor.ts
+++ b/web/src/pages/canvas/use-canvas-node-editor.ts
@@ -5,7 +5,7 @@ import { saveAs } from "file-saver";
 
 import { NODE_DEFAULT_SIZE } from "@/constant/canvas";
 import { FRAME_COLLAPSED_HEIGHT, FRAME_COLLAPSED_WIDTH, getFrameChildIds, isFrameNode } from "@/lib/canvas/canvas-frame";
-import { applyNodeConfigPatch } from "@/lib/canvas/canvas-project-domain";
+import { applyBatchPrimaryImage, applyNodeConfigPatch } from "@/lib/canvas/canvas-project-domain";
 import { audioExtension, imageExtension, resetGenerationTaskMetadata } from "@/lib/canvas/canvas-project-generation";
 import { CONTENT_MODERATION_ERROR_CODE, isContentModerationError } from "@/lib/generation-error";
 import { ensureCanvasNodeAsset } from "@/services/project-asset-sync";
@@ -117,7 +117,7 @@ export function useCanvasNodeEditor({
         setNodes((current) =>
             current.map((node) =>
                 node.id === rootId
-                    ? { ...node, width: child.width, height: child.height, metadata: { ...node.metadata, content: child.metadata?.content, primaryImageId: child.id, naturalWidth: child.metadata?.naturalWidth, naturalHeight: child.metadata?.naturalHeight, freeResize: child.metadata?.freeResize } }
+                    ? applyBatchPrimaryImage(node, child)
                     : node,
             ),
         );