diff --git a/cmfx/module.go b/cmfx/module.go
index 295b514e..aaae7354 100644
--- a/cmfx/module.go
+++ b/cmfx/module.go
@@ -5,10 +5,16 @@
 package cmfx
 
 import (
+	"fmt"
+
 	"github.com/issue9/orm/v6"
 	"github.com/issue9/web"
 )
 
+const moduleContextValue moduleContextType = 0
+
+type moduleContextType int
+
 // Module 表示代码模块的基本信息
 type Module struct {
 	id   string
@@ -19,11 +25,23 @@ type Module struct {
 }
 
 func NewModule(id string, desc web.LocaleStringer, s web.Server, db *orm.DB, r *web.Router) *Module {
+	// 防止重复的 id 值
+	m, loaded := s.Vars().LoadOrStore(moduleContextValue, map[string]struct{}{id: {}})
+	if loaded {
+		mm := m.(map[string]struct{})
+		if _, found := mm[id]; found {
+			panic(fmt.Sprintf("存在相同 id 的模块：%s\n", id))
+		} else {
+			mm[id] = struct{}{}
+			s.Vars().Store(moduleContextValue, mm)
+		}
+	}
+
 	return &Module{
 		id:   id,
 		desc: desc,
 		s:    s,
-		db:   db.New(db.TablePrefix() + id),
+		db:   db.New(id),
 		r:    r,
 	}
 }
diff --git a/cmfx/module_test.go b/cmfx/module_test.go
new file mode 100644
index 00000000..0860d47d
--- /dev/null
+++ b/cmfx/module_test.go
@@ -0,0 +1,76 @@
+// SPDX-FileCopyrightText: 2024 caixw
+//
+// SPDX-License-Identifier: MIT
+
+package cmfx
+
+import (
+	"net/http"
+	"os"
+	"testing"
+
+	"github.com/issue9/assert/v4"
+	"github.com/issue9/logs/v7"
+	"github.com/issue9/orm/v6"
+	"github.com/issue9/orm/v6/dialect"
+	"github.com/issue9/web"
+	"github.com/issue9/web/mimetype/json"
+	"github.com/issue9/web/server"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+func TestNewModule(t *testing.T) {
+	a := assert.New(t, false)
+	srv, err := server.NewHTTP("test", "1.0.0", &server.Options{
+		Logs:       logs.New(logs.NewTermHandler(os.Stdout, nil), logs.WithLevels(logs.AllLevels()...), logs.WithCreated(logs.NanoLayout)),
+		Codec:      web.NewCodec().AddMimetype(json.Mimetype, json.Marshal, json.Unmarshal, json.ProblemMimetype),
+		HTTPServer: &http.Server{Addr: ":8080"},
+	})
+	a.NotError(err).NotNil(srv)
+
+	const dbFile = "./sqlite3.db"
+
+	db, err := orm.NewDB("", dbFile, dialect.Sqlite3("sqlite3"))
+	a.NotError(err).NotNil(db)
+	defer func() {
+		a.NotError(db.Close())
+		a.NotError(os.Remove(dbFile))
+	}()
+
+	r := srv.Routers().New("def", nil)
+
+	mod := NewModule("m1", web.Phrase("m1"), srv, db, r)
+	a.NotNil(mod).
+		Equal(mod.ID(), "m1").
+		Equal(mod.Server(), srv).
+		NotEqual(mod.DB(), db).
+		Equal(mod.DB().TablePrefix(), "m1").
+		Equal(mod.Desc(), web.Phrase("m1")).
+		Equal(mod.Router(), r)
+
+	mod2 := mod.New("sub", web.Phrase("sub"))
+	a.NotNil(mod2).
+		Equal(mod2.ID(), "m1sub").
+		Equal(mod2.Server(), srv).
+		NotEqual(mod2.DB(), db).
+		Equal(mod2.DB().TablePrefix(), "m1sub").
+		Equal(mod2.Desc(), web.Phrase("sub")).
+		Equal(mod2.Router(), r)
+
+	mod3 := mod2.New("_sub", web.Phrase("sub"))
+	a.NotNil(mod3).
+		Equal(mod3.ID(), "m1sub_sub").
+		Equal(mod3.DB().TablePrefix(), "m1sub_sub")
+
+	a.PanicString(func() {
+		NewModule("m1sub", web.Phrase("m1sub"), srv, db, r)
+	}, "存在相同 id 的模块：m1sub")
+
+	a.Equal(mod2.Engine(nil), mod2.DB())
+
+	tx, err := mod2.DB().Begin()
+	a.NotError(err).NotNil(tx).
+		NotEqual(mod2.Engine(tx), mod2.DB()).
+		NotError(tx.Rollback()) // 结束事务
+}