diff --git a/core/WebDetection.go b/core/WebDetection.go
index 464d6d9..37a099c 100644
--- a/core/WebDetection.go
+++ b/core/WebDetection.go
@@ -9,6 +9,7 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/shadow1ng/fscan/common"
@@ -24,6 +25,10 @@ type WebPortDetector struct {
 	httpClient *http.Client
 	// HTTPS客户端
 	httpsClient *http.Client
+	// 检测结果缓存（避免重复检测）
+	detectionCache map[string]bool
+	// 缓存互斥锁
+	cacheMutex sync.RWMutex
 }
 
 // NewWebPortDetector 创建Web端口检测器
@@ -119,6 +124,7 @@ func NewWebPortDetector() *WebPortDetector {
 		httpTimeout:    timeout,
 		httpClient:     httpClient,
 		httpsClient:    httpsClient,
+		detectionCache: make(map[string]bool),
 	}
 }
 
@@ -130,9 +136,25 @@ func (w *WebPortDetector) IsWebService(host string, port int) bool {
 		return true
 	}
 
-	// 2. 智能路径：对非常见端口进行HTTP协议探测
+	// 2. 缓存检查：避免重复检测同一端口
+	cacheKey := fmt.Sprintf("%s:%d", host, port)
+	w.cacheMutex.RLock()
+	if cached, exists := w.detectionCache[cacheKey]; exists {
+		w.cacheMutex.RUnlock()
+		common.LogDebug(fmt.Sprintf("端口 %d 使用缓存结果: %v", port, cached))
+		return cached
+	}
+	w.cacheMutex.RUnlock()
+
+	// 3. 智能路径：对非常见端口进行HTTP协议探测
 	common.LogDebug(fmt.Sprintf("对端口 %d 进行智能Web检测", port))
 	result := w.detectHTTPService(host, port)
+	
+	// 4. 缓存结果
+	w.cacheMutex.Lock()
+	w.detectionCache[cacheKey] = result
+	w.cacheMutex.Unlock()
+	
 	common.LogDebug(fmt.Sprintf("端口 %d 智能检测结果: %v", port, result))
 	return result
 }