diff --git a/api/insurance/admin/ppt_admin_service.py b/api/insurance/admin/ppt_admin_service.py
index b02476c..6cec844 100644
--- a/api/insurance/admin/ppt_admin_service.py
+++ b/api/insurance/admin/ppt_admin_service.py
@@ -497,53 +497,30 @@ class PptAdminService:
         return {"code": 0, "data": {"models": self._BUILTIN_MODELS, "source": "builtin"}}
 
     def _fetch_dify_models(self) -> list | None:
-        """调用 Dify API 获取可用 LLM 模型列表，失败返回 None。"""
-        import requests
+        """从 Dify 数据库直接查询已配置的 LLM 模型列表。"""
         try:
-            base_url = os.getenv("DIFY_BASE_URL", "http://localhost:5001")
-
-            # 收集可用的 API Key，按优先级尝试
-            candidate_keys: list[str] = []
-            key_setting = SystemSetting.query.filter_by(key="dify_workspace_api_key").first()
-            if key_setting and key_setting.value:
-                candidate_keys.append(key_setting.value)
-            for env_key in ("DIFY_CHAT_APP_API_KEY", "DIFY_WORKFLOW_APP_API_KEY",
-                            "BAODAN_CHAT_API_KEY", "BAODAN_WORKFLOW_API_KEY"):
-                val = os.getenv(env_key, "").strip()
-                if val:
-                    candidate_keys.append(val)
-            # 去重保持顺序
-            seen = set()
-            api_keys = []
-            for k in candidate_keys:
-                if k not in seen:
-                    seen.add(k)
-                    api_keys.append(k)
-
-            for api_key in api_keys:
-                try:
-                    resp = requests.get(
-                        f"{base_url}/v1/workspaces/current/models/model-types/llm",
-                        headers={"Authorization": f"Bearer {api_key}"},
-                        timeout=10,
-                    )
-                    if resp.status_code != 200:
-                        continue
-                    data = resp.json()
-                    models = []
-                    for item in data.get("data", []):
-                        provider = item.get("provider", "")
-                        for model in item.get("models", []):
-                            model_name = model.get("model", "")
-                            label = model.get("label", {}).get("zh_Hans", "") or model.get("label", {}).get("en_US", "") or model_name
-                            models.append({"provider": provider, "model": model_name, "label": label})
-                    if models:
-                        return models
-                except Exception:
-                    continue
-            return None
+            rows = db.session.execute(db.text(
+                "SELECT DISTINCT pm.model_name, pm.provider_name "
+                "FROM provider_models pm "
+                "WHERE pm.model_type = 'llm' AND pm.is_valid = true "
+                "ORDER BY pm.provider_name, pm.model_name"
+            )).fetchall()
+            if not rows:
+                return None
+            models = []
+            for row in rows:
+                model_name = row[0]
+                provider_name = row[1]
+                # 从插件标识中提取简短供应商名
+                short_provider = provider_name.split("/")[-1] if "/" in provider_name else provider_name
+                models.append({
+                    "provider": short_provider,
+                    "model": model_name,
+                    "label": f"{model_name}",
+                })
+            return models
         except Exception as e:
-            logger.warning(f"从 Dify 获取模型列表失败: {e}")
+            logger.warning(f"从 Dify 数据库获取模型列表失败: {e}")
             return None
 
     def get_settings(self) -> dict:
diff --git a/frontend/src/pages/admin/PptSettingsAdmin.vue b/frontend/src/pages/admin/PptSettingsAdmin.vue
index a90a836..06edd6d 100644
--- a/frontend/src/pages/admin/PptSettingsAdmin.vue
+++ b/frontend/src/pages/admin/PptSettingsAdmin.vue
@@ -159,14 +159,34 @@ function onPosterProviderChange(val: string) {
   }
 }
 
+// 从模型名推断 base_url
+const MODEL_BASE_URLS: Record<string, string> = {
+  'deepseek': 'https://api.deepseek.com/v1',
+  'minimax': 'https://api.minimax.chat/v1',
+  'gemini': 'https://generativelanguage.googleapis.com/v1/models',
+  'gpt': 'https://api.openai.com/v1',
+  'claude': 'https://api.anthropic.com/v1',
+}
+
+function inferBaseUrl(model: string): string {
+  const lower = model.toLowerCase()
+  for (const [keyword, url] of Object.entries(MODEL_BASE_URLS)) {
+    if (lower.startsWith(keyword)) return url
+  }
+  return ''
+}
+
 function applyDifyModel(target: 'ppt' | 'poster', command: string) {
-  const [provider, model] = command.split('|')
+  const [, model] = command.split('|')
+  const baseUrl = inferBaseUrl(model)
   if (target === 'ppt') {
-    form.ppt_llm_provider = provider
+    form.ppt_llm_provider = 'custom'
     form.ppt_llm_model = model
+    form.ppt_llm_base_url = baseUrl
   } else {
-    form.poster_llm_provider = provider
+    form.poster_llm_provider = 'custom'
     form.poster_llm_model = model
+    form.poster_llm_base_url = baseUrl
   }
 }