diff --git a/drivers/123/driver.go b/drivers/123/driver.go
index 1f1ae858..f5d981ef 100644
--- a/drivers/123/driver.go
+++ b/drivers/123/driver.go
@@ -6,9 +6,12 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"fmt"
+	"golang.org/x/time/rate"
 	"io"
 	"net/http"
 	"net/url"
+	"sync"
+	"time"
 
 	"github.com/alist-org/alist/v3/drivers/base"
 	"github.com/alist-org/alist/v3/internal/driver"
@@ -26,6 +29,7 @@ import (
 type Pan123 struct {
 	model.Storage
 	Addition
+	apiRateLimit sync.Map
 }
 
 func (d *Pan123) Config() driver.Config {
@@ -254,4 +258,11 @@ func (d *Pan123) Put(ctx context.Context, dstDir model.Obj, stream model.FileStr
 	return err
 }
 
+func (d *Pan123) APIRateLimit(api string) bool {
+	limiter, _ := d.apiRateLimit.LoadOrStore(api,
+		rate.NewLimiter(rate.Every(time.Millisecond*700), 1))
+	ins := limiter.(*rate.Limiter)
+	return ins.Allow()
+}
+
 var _ driver.Driver = (*Pan123)(nil)
diff --git a/drivers/123/util.go b/drivers/123/util.go
index 1a86e1bd..9d5d6780 100644
--- a/drivers/123/util.go
+++ b/drivers/123/util.go
@@ -160,7 +160,7 @@ func (d *Pan123) login() error {
 		SetHeaders(map[string]string{
 			"origin":      "https://www.123pan.com",
 			"referer":     "https://www.123pan.com/",
-			"user-agent":  "Dart/2.19(dart:io)",
+			"user-agent":  "Dart/2.19(dart:io)-alist",
 			"platform":    "web",
 			"app-version": "3",
 			//"user-agent":  base.UserAgent,
@@ -197,7 +197,7 @@ func (d *Pan123) request(url string, method string, callback base.ReqCallback, r
 		"origin":        "https://www.123pan.com",
 		"referer":       "https://www.123pan.com/",
 		"authorization": "Bearer " + d.AccessToken,
-		"user-agent":    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 Edg/119.0.0.0",
+		"user-agent":    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) alist-client",
 		"platform":      "web",
 		"app-version":   "3",
 		//"user-agent":    base.UserAgent,
@@ -235,7 +235,12 @@ func (d *Pan123) request(url string, method string, callback base.ReqCallback, r
 func (d *Pan123) getFiles(parentId string) ([]File, error) {
 	page := 1
 	res := make([]File, 0)
+	// 2024-02-06 fix concurrency by 123pan
 	for {
+		if !d.APIRateLimit(FileList) {
+			time.Sleep(time.Millisecond * 200)
+			continue
+		}
 		var resp Files
 		query := map[string]string{
 			"driveId":              "0",