diff --git a/adapter/outbound/anytls.go b/adapter/outbound/anytls.go
index 482623ee..66722261 100644
--- a/adapter/outbound/anytls.go
+++ b/adapter/outbound/anytls.go
@@ -42,6 +42,7 @@ type AnyTLSOption struct {
 	UDP                      bool     `proxy:"udp,omitempty"`
 	IdleSessionCheckInterval int      `proxy:"idle-session-check-interval,omitempty"`
 	IdleSessionTimeout       int      `proxy:"idle-session-timeout,omitempty"`
+	MinIdleSession           int      `proxy:"min-idle-session,omitempty"`
 }
 
 func (t *AnyTLS) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
@@ -98,6 +99,7 @@ func NewAnyTLS(option AnyTLSOption) (*AnyTLS, error) {
 		Dialer:                   singDialer,
 		IdleSessionCheckInterval: time.Duration(option.IdleSessionCheckInterval) * time.Second,
 		IdleSessionTimeout:       time.Duration(option.IdleSessionTimeout) * time.Second,
+		MinIdleSession:           option.MinIdleSession,
 	}
 	tlsConfig := &vmess.TLSConfig{
 		Host:              option.SNI,
diff --git a/docs/config.yaml b/docs/config.yaml
index db66a2b3..934cf091 100644
--- a/docs/config.yaml
+++ b/docs/config.yaml
@@ -874,6 +874,7 @@ proxies: # socks5
     udp: true
     # idle-session-check-interval: 30 # seconds
     # idle-session-timeout: 30 # seconds
+    # min-idle-session: 0
     # sni: "example.com"
     # alpn:
     #   - h2
diff --git a/transport/anytls/client.go b/transport/anytls/client.go
index 19776df9..ea99b438 100644
--- a/transport/anytls/client.go
+++ b/transport/anytls/client.go
@@ -22,19 +22,19 @@ type ClientConfig struct {
 	Password                 string
 	IdleSessionCheckInterval time.Duration
 	IdleSessionTimeout       time.Duration
+	MinIdleSession           int
 	Server                   M.Socksaddr
 	Dialer                   N.Dialer
 	TLSConfig                *vmess.TLSConfig
 }
 
 type Client struct {
-	passwordSha256    []byte
-	tlsConfig         *vmess.TLSConfig
-	clientFingerprint string
-	dialer            N.Dialer
-	server            M.Socksaddr
-	sessionClient     *session.Client
-	padding           atomic.TypedValue[*padding.PaddingFactory]
+	passwordSha256 []byte
+	tlsConfig      *vmess.TLSConfig
+	dialer         N.Dialer
+	server         M.Socksaddr
+	sessionClient  *session.Client
+	padding        atomic.TypedValue[*padding.PaddingFactory]
 }
 
 func NewClient(ctx context.Context, config ClientConfig) *Client {
@@ -47,7 +47,7 @@ func NewClient(ctx context.Context, config ClientConfig) *Client {
 	}
 	// Initialize the padding state of this client
 	padding.UpdatePaddingScheme(padding.DefaultPaddingScheme, &c.padding)
-	c.sessionClient = session.NewClient(ctx, c.CreateOutboundTLSConnection, &c.padding, config.IdleSessionCheckInterval, config.IdleSessionTimeout)
+	c.sessionClient = session.NewClient(ctx, c.CreateOutboundTLSConnection, &c.padding, config.IdleSessionCheckInterval, config.IdleSessionTimeout, config.MinIdleSession)
 	return c
 }
 
diff --git a/transport/anytls/session/client.go b/transport/anytls/session/client.go
index 2312a6ff..58adbf94 100644
--- a/transport/anytls/session/client.go
+++ b/transport/anytls/session/client.go
@@ -28,13 +28,15 @@ type Client struct {
 	padding *atomic.TypedValue[*padding.PaddingFactory]
 
 	idleSessionTimeout time.Duration
+	minIdleSession     int
 }
 
-func NewClient(ctx context.Context, dialOut func(ctx context.Context) (net.Conn, error), _padding *atomic.TypedValue[*padding.PaddingFactory], idleSessionCheckInterval, idleSessionTimeout time.Duration) *Client {
+func NewClient(ctx context.Context, dialOut func(ctx context.Context) (net.Conn, error), _padding *atomic.TypedValue[*padding.PaddingFactory], idleSessionCheckInterval, idleSessionTimeout time.Duration, minIdleSession int) *Client {
 	c := &Client{
 		dialOut:            dialOut,
 		padding:            _padding,
 		idleSessionTimeout: idleSessionTimeout,
+		minIdleSession:     minIdleSession,
 	}
 	if idleSessionCheckInterval <= time.Second*5 {
 		idleSessionCheckInterval = time.Second * 30
@@ -138,17 +140,30 @@ func (c *Client) idleCleanup() {
 }
 
 func (c *Client) idleCleanupExpTime(expTime time.Time) {
-	var sessionToRemove = make([]*Session, 0)
+	sessionToRemove := make([]*Session, 0, c.idleSession.Len())
 
 	c.idleSessionLock.Lock()
 	it := c.idleSession.Iterate()
+
+	activeCount := 0
 	for it.IsNotEnd() {
 		session := it.Value()
-		if session.idleSince.Before(expTime) {
-			sessionToRemove = append(sessionToRemove, session)
-			c.idleSession.Remove(it.Key())
-		}
+		key := it.Key()
 		it.MoveToNext()
+
+		if !session.idleSince.Before(expTime) {
+			activeCount++
+			continue
+		}
+
+		if activeCount < c.minIdleSession {
+			session.idleSince = time.Now()
+			activeCount++
+			continue
+		}
+
+		sessionToRemove = append(sessionToRemove, session)
+		c.idleSession.Remove(key)
 	}
 	c.idleSessionLock.Unlock()