diff --git a/css/style.css b/css/style.css
index 8d90aa5..bec8a1f 100644
--- a/css/style.css
+++ b/css/style.css
@@ -226,6 +226,15 @@ body::before {
     box-shadow: 0 4px 18px rgba(0, 245, 212, 0.4);
 }
 
+.icon-btn.disabled,
+.icon-btn:disabled {
+    opacity: 0.3;
+    cursor: not-allowed;
+    transform: none;
+    box-shadow: none;
+    pointer-events: none;
+}
+
 .icon-btn:active {
     transform: scale(0.95);
 }
diff --git a/js/components/input-area.js b/js/components/input-area.js
index d462c54..da3ffbf 100644
--- a/js/components/input-area.js
+++ b/js/components/input-area.js
@@ -5,7 +5,7 @@
 
 import { state, KEYS } from '../state.js';
 import { fileToBase64, fileToText, detectLanguage, debounce, truncate, escapeHtml, formatSize } from '../utils.js';
-import { getSelectedModel, isThinkEnabled } from './model-bar.js';
+import { getSelectedModel, isThinkEnabled, isVisionAvailable } from './model-bar.js';
 import {
     renderMessages, appendAssistantPlaceholder, appendSystemMessage,
     updateLastAssistantMessage, clearMessages, safeMarkdown
@@ -98,7 +98,13 @@ export function initInputArea() {
     chatInputEl.addEventListener('input', autoResizeTextarea);
 
     // 图片上传
-    document.querySelector('#btnAttachImg').addEventListener('click', () => fileInputEl.click());
+    document.querySelector('#btnAttachImg').addEventListener('click', () => {
+        if (!isVisionAvailable()) {
+            showToast('当前模型不支持图片分析', 'warning');
+            return;
+        }
+        fileInputEl.click();
+    });
     fileInputEl.addEventListener('change', (e) => {
         handleImageSelect(e.target.files);
         e.target.value = '';
@@ -290,6 +296,12 @@ export async function sendMessage() {
         return;
     }
 
+    // 有图片但模型不支持 vision → 阻止发送
+    if (pendingImages.length > 0 && !isVisionAvailable()) {
+        appendSystemMessage('⚠️ 当前模型不支持图片分析，请移除图片后重试');
+        return;
+    }
+
     const currentSession = state.get(KEYS.CURRENT_SESSION);
     if (!currentSession) return;
 
diff --git a/js/components/model-bar.js b/js/components/model-bar.js
index b05749a..947d87a 100644
--- a/js/components/model-bar.js
+++ b/js/components/model-bar.js
@@ -6,7 +6,7 @@
 import { state, KEYS } from '../state.js';
 import { formatSize } from '../utils.js';
 
-let modelSelectEl, badgeThinkEl, badgeVisionEl, thinkCheckbox, thinkWrap;
+let modelSelectEl, badgeThinkEl, badgeVisionEl, thinkCheckbox, thinkWrap, btnAttachImg;
 
 /** 缓存模型能力 { modelName: { think: bool, vision: bool } } */
 const modelCapabilityCache = new Map();
@@ -17,6 +17,7 @@ export function initModelBar() {
     badgeVisionEl = document.querySelector('#badgeVision');
     thinkCheckbox = document.querySelector('#toggleThink');
     thinkWrap = document.querySelector('#thinkToggleWrap');
+    btnAttachImg = document.querySelector('#btnAttachImg');
 
     // 模型切换 → 检测能力 + 保存设置
     modelSelectEl.addEventListener('change', async () => {
@@ -26,6 +27,7 @@ export function initModelBar() {
             await checkModelCapability(model);
         } else {
             setThinkAvailable(false);
+            setVisionAvailable(false);
             badgeThinkEl.style.display = 'none';
             badgeVisionEl.style.display = 'none';
         }
@@ -48,6 +50,7 @@ export async function loadModels() {
         if (!data.models || data.models.length === 0) {
             modelSelectEl.innerHTML = '<option value="">未安装任何模型</option>';
             badgeThinkEl.style.display = 'none'; badgeVisionEl.style.display = 'none';
+            setThinkAvailable(false); setVisionAvailable(false);
             return;
         }
 
@@ -77,6 +80,7 @@ export async function loadModels() {
         console.error('[ModelBar] 加载模型失败:', err);
         modelSelectEl.innerHTML = '<option value="">加载失败 - 检查连接</option>';
         badgeThinkEl.style.display = 'none'; badgeVisionEl.style.display = 'none';
+        setThinkAvailable(false); setVisionAvailable(false);
     }
 }
 
@@ -117,6 +121,7 @@ async function checkModelCapability(modelName) {
  */
 function applyCapability(modelName, caps) {
     setThinkAvailable(caps.think);
+    setVisionAvailable(caps.vision);
 
     // 更新能力标签
     badgeThinkEl.style.display = caps.think ? '' : 'none';
@@ -139,6 +144,29 @@ function setThinkAvailable(available) {
     }
 }
 
+/**
+ * 设置图片上传按钮是否可用
+ */
+function setVisionAvailable(available) {
+    if (!btnAttachImg) return;
+    if (available) {
+        btnAttachImg.disabled = false;
+        btnAttachImg.title = '上传图片';
+        btnAttachImg.classList.remove('disabled');
+    } else {
+        btnAttachImg.disabled = true;
+        btnAttachImg.title = '当前模型不支持图片分析';
+        btnAttachImg.classList.add('disabled');
+    }
+}
+
+/**
+ * 当前选择的模型是否支持视觉分析
+ */
+export function isVisionAvailable() {
+    return btnAttachImg && !btnAttachImg.disabled;
+}
+
 /**
  * 获取当前选择的模型
  */