diff --git a/components/chat.tsx b/components/chat.tsx
index 136125564..da47c6c9d 100644
--- a/components/chat.tsx
+++ b/components/chat.tsx
@@ -37,6 +37,32 @@ import type { VisibilityType } from "@/components/visibility-selector";
 import type { VideoGenerationParams } from "@/components/video-params-bar";
 import type { ImageGenerationParams } from "@/components/image-params-bar";
 
+function normalizeImageParamsForProvider(
+  params: ImageGenerationParams,
+  providerType?: string
+): ImageGenerationParams {
+  const normalized = { ...params };
+  const currentCount = normalized.imageCount || 1;
+
+  if (providerType === "ruxa-image") {
+    normalized.imageCount = 1;
+    return normalized;
+  }
+
+  if (providerType === "alibaba-image") {
+    normalized.imageCount = Math.min(Math.max(currentCount, 1), 6);
+    return normalized;
+  }
+
+  if (providerType === "volcano-vision") {
+    normalized.imageCount = Math.min(Math.max(currentCount, 1), 3);
+    return normalized;
+  }
+
+  normalized.imageCount = Math.min(Math.max(currentCount, 1), 2);
+  return normalized;
+}
+
 export function Chat({
   id,
   initialMessages,
@@ -167,13 +193,14 @@ export function Chat({
 
   // 🆕 保存图片参数到 localStorage
   const handleImageParamsChange = (params: ImageGenerationParams) => {
-    setImageParams(params);
+    const normalized = normalizeImageParamsForProvider(params, currentModel?.providerType);
+    setImageParams(normalized);
     try {
-      localStorage.setItem("gemini-image-params", JSON.stringify(params));
+      localStorage.setItem("gemini-image-params", JSON.stringify(normalized));
     } catch (e) {
       console.error("Failed to save image params:", e);
     }
-    console.log("[Chat] Image params updated:", params);
+    console.log("[Chat] Image params updated:", normalized);
   };
 
   // 🆕 获取模型列表以检查是否是视频模型/图片模型
@@ -247,11 +274,17 @@ export function Chat({
   // 🆕 当切换到图片模型时，强制更新 imageParams（确保组件重新渲染）
   useEffect(() => {
     if (isImageModel) {
-      // 强制更新一次 imageParams 以触发重新渲染
-      setImageParams(prev => ({...prev}));
-      console.log("[Chat] 图片模型已激活，触发参数更新");
+      setImageParams((prev) => {
+        const next = normalizeImageParamsForProvider(prev, currentModel?.providerType);
+        if (JSON.stringify(prev) === JSON.stringify(next)) return prev;
+        try {
+          localStorage.setItem("gemini-image-params", JSON.stringify(next));
+        } catch {}
+        return next;
+      });
+      console.log("[Chat] 图片模型已激活，参数已按当前模型规范化");
     }
-  }, [isImageModel]);
+  }, [isImageModel, currentModel?.providerType]);
 
   useEffect(() => {
     currentModelIdRef.current = currentModelId;
diff --git a/components/image-params-bar.tsx b/components/image-params-bar.tsx
index 225ddf7b8..b463a0490 100644
--- a/components/image-params-bar.tsx
+++ b/components/image-params-bar.tsx
@@ -79,17 +79,11 @@ export function ImageParamsBar({
   providerType = "gemini", // 默认 gemini
   imageGenConfig,
 }: ImageParamsBarProps) {
-  const [params, setParams] = useState<ImageGenerationParams>({
-    aspectRatio: "auto",
-    imageSize: "2K", // 默认 2K
-    imageCount: 1, // 默认 1 张
-    promptExtend: true, // 阿里生图默认开启提示词优化
-    watermark: false,
-    ...initialParams,
-  });
-
-  // 根据模型类型和配置确定可选的图片数量
   const getImageCountOptions = () => {
+    // RUXA 当前按单图任务处理（优先级最高）
+    if (providerType === "ruxa-image") {
+      return [1];
+    }
     // 优先使用模型配置中的 maxImages
     if (imageGenConfig?.maxImages) {
       return Array.from({ length: imageGenConfig.maxImages }, (_, i) => i + 1);
@@ -99,10 +93,6 @@ export function ImageParamsBar({
       // 阿里生图：1~6 张（qwen-image-edit-plus）
       return [1, 2, 3, 4, 5, 6];
     }
-    if (providerType === "ruxa-image") {
-      // RUXA 当前按单图任务处理
-      return [1];
-    }
     if (providerType === "volcano-vision") {
       // 即梦4.5（豆包）：1~3 张
       return [1, 2, 3];
@@ -110,7 +100,41 @@ export function ImageParamsBar({
     // Gemini：1~2 张
     return [1, 2];
   };
-  
+
+  const clampParamsByProvider = (raw: ImageGenerationParams): ImageGenerationParams => {
+    const options = getImageCountOptions();
+    const fallbackCount = options[0] ?? 1;
+    const imageCount = options.includes(raw.imageCount || fallbackCount) ? (raw.imageCount || fallbackCount) : fallbackCount;
+    return {
+      ...raw,
+      imageCount,
+    };
+  };
+
+  const isSameParams = (a: ImageGenerationParams, b: ImageGenerationParams) =>
+    a.aspectRatio === b.aspectRatio &&
+    a.imageSize === b.imageSize &&
+    (a.imageCount || 1) === (b.imageCount || 1) &&
+    a.size === b.size &&
+    a.negativePrompt === b.negativePrompt &&
+    a.promptExtend === b.promptExtend &&
+    a.watermark === b.watermark &&
+    a.seed === b.seed;
+
+  const buildBaseParams = (source?: Partial<ImageGenerationParams>) =>
+    clampParamsByProvider({
+      aspectRatio: "auto",
+      imageSize: "2K",
+      imageCount: 1,
+      promptExtend: true,
+      watermark: false,
+      ...source,
+    });
+
+  const [params, setParams] = useState<ImageGenerationParams>({
+    ...buildBaseParams(initialParams),
+  });
+
   const imageCountOptions = getImageCountOptions();
   
   // 是否显示阿里生图专用参数
@@ -121,25 +145,26 @@ export function ImageParamsBar({
   // 🆕 监听 initialParams 变化，确保状态同步
   useEffect(() => {
     console.log("[ImageParamsBar] Mount/Update - initialParams:", initialParams);
-    // 如果 initialParams 存在，更新参数
-    // 如果 initialParams 是 undefined，保持当前参数不变（使用 useState 的初始值）
-    if (initialParams !== undefined) {
-      setParams((prevParams) => ({
-        // 先使用默认值
-        aspectRatio: "auto",
-        imageSize: "2K",
-        imageCount: 1,
-        // 然后应用 initialParams（会覆盖默认值）
-        ...initialParams,
-      }));
+    const rawParams = {
+      aspectRatio: "auto",
+      imageSize: "2K",
+      imageCount: 1,
+      promptExtend: true,
+      watermark: false,
+      ...(initialParams || {}),
+    } as ImageGenerationParams;
+    const nextParams = buildBaseParams(initialParams);
+    setParams((prevParams) => (isSameParams(prevParams, nextParams) ? prevParams : nextParams));
+    if (initialParams !== undefined && onParamsChange && !isSameParams(rawParams, nextParams)) {
+      onParamsChange(nextParams);
     }
-  }, [initialParams]);
+  }, [initialParams, providerType, imageGenConfig?.maxImages]);
 
   const updateParam = <K extends keyof ImageGenerationParams>(
     key: K,
     value: ImageGenerationParams[K]
   ) => {
-    const newParams = { ...params, [key]: value };
+    const newParams = clampParamsByProvider({ ...params, [key]: value });
     console.log("[ImageParamsBar] Updating param:", key, "=", value);
     console.log("[ImageParamsBar] New params:", newParams);
     setParams(newParams);