diff --git a/backend/app_browser_core_scan_test.go b/backend/app_browser_core_scan_test.go
new file mode 100644
index 00000000..0d2813a9
--- /dev/null
+++ b/backend/app_browser_core_scan_test.go
@@ -0,0 +1,84 @@
+package backend
+
+import (
+	"ant-chrome/backend/internal/browser"
+	"ant-chrome/backend/internal/config"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+type browserCoreDAOStub struct {
+	list []browser.Core
+}
+
+func (s *browserCoreDAOStub) List() ([]browser.Core, error) {
+	return append([]browser.Core{}, s.list...), nil
+}
+
+func (s *browserCoreDAOStub) Upsert(core browser.Core) error {
+	for i := range s.list {
+		if s.list[i].CoreId == core.CoreId {
+			s.list[i] = core
+			return nil
+		}
+	}
+	s.list = append(s.list, core)
+	return nil
+}
+
+func (s *browserCoreDAOStub) Delete(coreId string) error {
+	next := s.list[:0]
+	for _, core := range s.list {
+		if core.CoreId != coreId {
+			next = append(next, core)
+		}
+	}
+	s.list = next
+	return nil
+}
+
+func (s *browserCoreDAOStub) SetDefault(coreId string) error {
+	for i := range s.list {
+		s.list[i].IsDefault = s.list[i].CoreId == coreId
+	}
+	return nil
+}
+
+func TestBrowserCoreScanRegistersDetectedCoreInDAO(t *testing.T) {
+	root := t.TempDir()
+	coreDir := filepath.Join(root, "chrome", "chromium-148")
+	exePath := filepath.Join(coreDir, filepath.FromSlash(browser.CoreExecutableCandidates()[0]))
+	if err := os.MkdirAll(filepath.Dir(exePath), 0o755); err != nil {
+		t.Fatalf("创建测试内核目录失败: %v", err)
+	}
+	if err := os.WriteFile(exePath, []byte("stub"), 0o755); err != nil {
+		t.Fatalf("写入测试内核可执行文件失败: %v", err)
+	}
+
+	cfg := config.DefaultConfig()
+	cfg.Browser.Cores = nil
+
+	app := NewApp(root)
+	app.config = cfg
+	app.browserMgr = browser.NewManager(cfg, root)
+	dao := &browserCoreDAOStub{}
+	app.browserMgr.CoreDAO = dao
+
+	cores := app.BrowserCoreScan()
+	if len(dao.list) != 1 {
+		t.Fatalf("扫描后应写入 DAO 1 个内核，got=%d", len(dao.list))
+	}
+	if dao.list[0].CoreId != "core-chromium-148" {
+		t.Fatalf("内核 ID 不符合预期: got=%q", dao.list[0].CoreId)
+	}
+	if dao.list[0].CorePath != filepath.Join("chrome", "chromium-148") {
+		t.Fatalf("内核路径不符合预期: got=%q", dao.list[0].CorePath)
+	}
+	if !dao.list[0].IsDefault {
+		t.Fatal("首个扫描到的内核应设为默认")
+	}
+	if len(cores) != 1 || cores[0].CoreId != dao.list[0].CoreId {
+		t.Fatalf("扫描返回列表未包含新内核: %+v", cores)
+	}
+}
diff --git a/backend/app_utils.go b/backend/app_utils.go
index 405ff3da..4724c9f9 100644
--- a/backend/app_utils.go
+++ b/backend/app_utils.go
@@ -9,6 +9,7 @@ import (
 	"net"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/google/uuid"
@@ -58,7 +59,7 @@ func (a *App) ensureDefaultCores() {
 	log := logger.New("Browser")
 
 	// 扫描 chrome/ 目录，无论配置是否已有内核都执行一次，确保新增子目录被发现
-	detected := a.scanChromeDir("chrome")
+	detected := a.scanChromeDir(a.browserCoreRoot())
 
 	if len(a.config.Browser.Cores) == 0 {
 		// 配置为空：直接用扫描结果，或兜底写一个占位
@@ -100,9 +101,8 @@ func (a *App) ensureDefaultCores() {
 
 func (a *App) autoDetectCores() {
 	log := logger.New("Browser")
-	// ensureDefaultCores 已完成扫描注册，这里只做路径有效性日志。
+	cores := a.scanAndRegisterCores()
 	// SQLite 模式下以内核表为准，避免与 config.yaml 历史条目不一致。
-	cores := a.config.Browser.Cores
 	if a.browserMgr != nil {
 		cores = a.browserMgr.ListCores()
 	}
@@ -116,6 +116,61 @@ func (a *App) autoDetectCores() {
 	}
 }
 
+func (a *App) browserCoreRoot() string {
+	if a != nil && a.config != nil {
+		if root := strings.TrimSpace(a.config.Browser.CoreRoot); root != "" {
+			return root
+		}
+	}
+	return "chrome"
+}
+
+func (a *App) scanAndRegisterCores() []browser.Core {
+	log := logger.New("Browser")
+	detected := a.scanChromeDir(a.browserCoreRoot())
+	if len(detected) == 0 || a.browserMgr == nil {
+		return detected
+	}
+
+	existing := a.browserMgr.ListCores()
+	knownPaths := make(map[string]struct{}, len(existing))
+	hasDefault := false
+	for _, core := range existing {
+		knownPaths[normalizeCorePathForCompare(core.CorePath)] = struct{}{}
+		if core.IsDefault {
+			hasDefault = true
+		}
+	}
+
+	for _, core := range detected {
+		if _, ok := knownPaths[normalizeCorePathForCompare(core.CorePath)]; ok {
+			continue
+		}
+		core.IsDefault = !hasDefault
+		if err := a.browserMgr.SaveCore(browser.CoreInput{
+			CoreId:    core.CoreId,
+			CoreName:  core.CoreName,
+			CorePath:  core.CorePath,
+			IsDefault: core.IsDefault,
+		}); err != nil {
+			log.Warn("自动注册内核失败", logger.F("core_id", core.CoreId), logger.F("path", core.CorePath), logger.F("error", err.Error()))
+			continue
+		}
+		log.Info("发现新内核，已注册", logger.F("core_id", core.CoreId), logger.F("path", core.CorePath))
+		knownPaths[normalizeCorePathForCompare(core.CorePath)] = struct{}{}
+		hasDefault = hasDefault || core.IsDefault
+	}
+	return a.browserMgr.ListCores()
+}
+
+func normalizeCorePathForCompare(path string) string {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return ""
+	}
+	return filepath.ToSlash(filepath.Clean(path))
+}
+
 // scanChromeDir 扫描指定目录，将包含浏览器可执行文件的子文件夹识别为内核。
 // 如果目录本身包含可执行文件（旧版单内核结构），则直接返回该目录作为内核。
 func (a *App) scanChromeDir(chromeRoot string) []browser.Core {