diff --git a/backend/app/api/routes.py b/backend/app/api/routes.py
index 0b2a9ded..4144054e 100644
--- a/backend/app/api/routes.py
+++ b/backend/app/api/routes.py
@@ -141,6 +141,7 @@ async def run_analysis(
                 alpha_vantage_api_key=request.alpha_vantage_api_key or "",
                 finmind_api_key=request.finmind_api_key or "",
                 language=request.language or "zh-TW",  # Pass language for agent reports
+                analysis_mode=request.analysis_mode or "deep",  # Pass analysis mode (fast or deep)
             ))
             
             # Check for errors in result
diff --git a/backend/app/models/schemas.py b/backend/app/models/schemas.py
index 1cc99a6e..8a75c746 100644
--- a/backend/app/models/schemas.py
+++ b/backend/app/models/schemas.py
@@ -67,6 +67,10 @@ class AnalysisRequest(BaseModel):
         default="zh-TW",
         description="Language for agent reports: 'en' for English, 'zh-TW' for Traditional Chinese"
     )
+    analysis_mode: Optional[Literal["fast", "deep"]] = Field(
+        default="deep",
+        description="Analysis mode: 'fast' (no debates, ~15-25 min) or 'deep' (with debates, ~1 hour)"
+    )
 
 class PriceData(BaseModel):
     """Stock price data model"""
diff --git a/backend/app/services/trading_service.py b/backend/app/services/trading_service.py
index 2f135009..e6b7806b 100644
--- a/backend/app/services/trading_service.py
+++ b/backend/app/services/trading_service.py
@@ -28,14 +28,33 @@ class TradingService:
         research_depth: int = 1,
         deep_think_llm: str = "gpt-5-mini",
         quick_think_llm: str = "gpt-5-mini",
+        analysis_mode: str = "deep",
     ) -> Dict[str, Any]:
-        """Create configuration for TradingAgentsX"""
+        """Create configuration for TradingAgentsX
+
+        Args:
+            research_depth: Research depth (1-5)
+            deep_think_llm: Deep thinking LLM model
+            quick_think_llm: Quick thinking LLM model
+            analysis_mode: "fast" (no debates) or "deep" (with debates)
+        """
         config = self.default_config.copy()
-        config["max_debate_rounds"] = research_depth
-        config["max_risk_discuss_rounds"] = research_depth
         config["deep_think_llm"] = deep_think_llm
         config["quick_think_llm"] = quick_think_llm
         config["results_dir"] = settings.results_dir
+
+        # Handle analysis mode
+        if analysis_mode == "fast":
+            # Fast mode: disable debates entirely
+            config["max_debate_rounds"] = 0
+            config["max_risk_discuss_rounds"] = 0
+            logger.info("Analysis mode: FAST (debates disabled)")
+        else:
+            # Deep mode: use research_depth for debate rounds
+            config["max_debate_rounds"] = research_depth
+            config["max_risk_discuss_rounds"] = research_depth
+            logger.info(f"Analysis mode: DEEP (research_depth={research_depth})")
+
         return config
     
     async def run_analysis(
@@ -59,6 +78,7 @@ class TradingService:
         deep_think_llm: str = "gpt-5-mini",
         quick_think_llm: str = "gpt-5-mini",
         language: str = "zh-TW",  # Language for agent reports: 'en' or 'zh-TW'
+        analysis_mode: str = "deep",  # Analysis mode: 'fast' (no debates) or 'deep' (with debates)
     ) -> Dict[str, Any]:
         """
         Run trading analysis for a given ticker and date with user-provided API keys
@@ -106,8 +126,8 @@ class TradingService:
                     os.environ["OPENAI_API_KEY"] = openai_api_key
                 
                 # Create configuration
-                logger.info(f"Initializing TradingAgentsX for {ticker} on {analysis_date}")
-                config = self.create_config(research_depth, deep_think_llm, quick_think_llm)
+                logger.info(f"Initializing TradingAgentsX for {ticker} on {analysis_date} (mode={analysis_mode})")
+                config = self.create_config(research_depth, deep_think_llm, quick_think_llm, analysis_mode)
                 
                 # Normalize base URLs (ensure lowercase paths, common issue with custom endpoints)
                 def normalize_base_url(url: str) -> str:
diff --git a/frontend/components/analysis/AnalysisForm.tsx b/frontend/components/analysis/AnalysisForm.tsx
index 31386ecb..b9d032a9 100644
--- a/frontend/components/analysis/AnalysisForm.tsx
+++ b/frontend/components/analysis/AnalysisForm.tsx
@@ -52,6 +52,7 @@ const formSchema = z.object({
     .regex(/^\d{4}-\d{2}-\d{2}$/, "日期格式必須為 YYYY-MM-DD"),
   analysts: z.array(z.string()).min(1, "請至少選擇一位分析師"),
   research_depth: z.number().int().min(1).max(5),
+  analysis_mode: z.enum(["fast", "deep"]).default("deep"),
   quick_think_llm: z.string().min(1, "請選擇快速思維模型"),
   deep_think_llm: z.string().min(1, "請選擇深層思維模型"),
   embedding_model: z.string().min(1, "請選擇嵌入式模型"),
@@ -111,6 +112,7 @@ export function AnalysisForm({ onSubmit, loading = false }: AnalysisFormProps) {
       analysis_date: format(new Date(), "yyyy-MM-dd"),
       analysts: ["market", "social", "news", "fundamentals"], // 預設全選
       research_depth: 3, // 預設中等層級
+      analysis_mode: "deep", // 預設深層分析
       market_type: "us", // 預設美股
       quick_think_llm: "gpt-5-mini",
       deep_think_llm: "gpt-5-mini",
@@ -473,6 +475,35 @@ export function AnalysisForm({ onSubmit, loading = false }: AnalysisFormProps) {
                 />
               </div>
 
+              {/* 分析模式行 */}
+              <div className="md:col-span-2 grid grid-cols-1 md:grid-cols-2 gap-6">
+                <FormField
+                  control={form.control}
+                  name="analysis_mode"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>分析模式</FormLabel>
+                      <Select
+                        onValueChange={field.onChange}
+                        defaultValue={field.value}
+                      >
+                        <FormControl>
+                          <SelectTrigger>
+                            <SelectValue placeholder="選擇分析模式" />
+                          </SelectTrigger>
+                        </FormControl>
+                        <SelectContent>
+                          <SelectItem value="fast">快速分析 (~15-25 分鐘)</SelectItem>
+                          <SelectItem value="deep">深層分析 (~1 小時)</SelectItem>
+                        </SelectContent>
+                      </Select>
+                      <FormDescription>快速模式跳過辯論，深層模式包含投資和風險辯論</FormDescription>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+              </div>
+
               {/* 第二行：研究深度、快速思維模型、深層思維模型、嵌入式模型（4列） */}
               <div className="md:col-span-2 grid grid-cols-1 md:grid-cols-4 gap-6">
                 <FormField
diff --git a/frontend/lib/types.ts b/frontend/lib/types.ts
index 3cb98225..bdca5858 100644
--- a/frontend/lib/types.ts
+++ b/frontend/lib/types.ts
@@ -7,6 +7,7 @@ export interface AnalysisRequest {
   analysis_date: string;
   analysts?: string[];
   research_depth?: number;
+  analysis_mode?: "fast" | "deep";  // Analysis mode: 'fast' (no debates) or 'deep' (with debates)
   market_type?: "us" | "twse" | "tpex";  // 市場類型：美股、上市、上櫃/興櫃
   quick_think_llm?: string;
   deep_think_llm?: string;