diff --git a/util/guid/guid.go b/util/guid/guid.go
index 769cc1d4e..2746c31b9 100644
--- a/util/guid/guid.go
+++ b/util/guid/guid.go
@@ -11,10 +11,4 @@
 // This package only provides unique number generation for simple, convenient and most common
 // usage purpose, but does not provide strict global unique number generation. Please refer
 // to UUID algorithm for global unique number generation if necessary.
-//
-// Unique Number ID:
-// An Improved SnowFlake ID is inspired by Twitter's Snowflake, which is composed of:
-//     39 bits for time in units of 10 msec
-//     16 bits for a machine id
-//      8 bits for a sequence number.
 package guid
diff --git a/util/guid/guid_number.go b/util/guid/guid_number.go
deleted file mode 100644
index a2459cd86..000000000
--- a/util/guid/guid_number.go
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2020 gf Author(https://github.com/gogf/gf). All Rights Reserved.
-//
-// This Source Code Form is subject to the terms of the MIT License.
-// If a copy of the MIT was not distributed with this file,
-// You can obtain one at https://github.com/gogf/gf.
-
-package guid
-
-import (
-	"errors"
-	"github.com/gogf/gf/container/gtype"
-	"net"
-	"time"
-)
-
-const (
-	BitLenTime      = 39                               // Bit length of time.
-	BitLenSequence  = 8                                // Bit length of sequence number.
-	BitLenMachineID = 63 - BitLenTime - BitLenSequence // Bit length of machine id.
-)
-
-var (
-	// MachineId is 16 bits number composed with the last two parts of the first local private ip.
-	// You can change it as your custom machine id in boot time, but do not change it in runtime.
-	// Note that if there's no net card on the machine, it panics when the process boots.
-	MachineId uint16
-
-	// sequenceNumber is used for internal concurrent-safe sequence number counting.
-	sequenceNumber = gtype.NewInt()
-)
-
-func init() {
-	if MachineId != 0 {
-		return
-	}
-	ip, err := getPrivateIPv4()
-	if err != nil {
-		panic(err)
-	}
-	MachineId = uint16(ip[2])<<8 | uint16(ip[3])
-}
-
-// I creates and returns an uint64 id which using improved SnowFlake algorithm.
-// An Improved SnowFlake ID is composed of:
-//     39 bits for time in units of 10 msec
-//     16 bits for a machine id
-//      8 bits for a sequence number.
-func I() uint64 {
-	return uint64(time.Now().UnixNano())<<(BitLenMachineID+BitLenSequence) | uint64(MachineId<<BitLenSequence) | uint64(sequenceNumber.Add(1)%0xFF)
-}
-
-func getPrivateIPv4() (net.IP, error) {
-	as, err := net.InterfaceAddrs()
-	if err != nil {
-		return nil, err
-	}
-	for _, a := range as {
-		ipNet, ok := a.(*net.IPNet)
-		if !ok || ipNet.IP.IsLoopback() {
-			continue
-		}
-
-		ip := ipNet.IP.To4()
-		if isPrivateIPv4(ip) {
-			return ip, nil
-		}
-	}
-	return nil, errors.New("no private ip address")
-}
-
-func isPrivateIPv4(ip net.IP) bool {
-	return ip != nil &&
-		(ip[0] == 10 || ip[0] == 172 && (ip[1] >= 16 && ip[1] < 32) || ip[0] == 192 && ip[1] == 168)
-}
diff --git a/util/guid/guid_z_bench_test.go b/util/guid/guid_z_bench_test.go
index 301ae20cc..07955a648 100644
--- a/util/guid/guid_z_bench_test.go
+++ b/util/guid/guid_z_bench_test.go
@@ -36,11 +36,3 @@ func Benchmark_S_Data_2(b *testing.B) {
 		}
 	})
 }
-
-func Benchmark_I(b *testing.B) {
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			guid.I()
-		}
-	})
-}
diff --git a/util/guid/guid_z_unit_test.go b/util/guid/guid_z_unit_test.go
index 24bce403b..1b35fdb9a 100644
--- a/util/guid/guid_z_unit_test.go
+++ b/util/guid/guid_z_unit_test.go
@@ -11,7 +11,6 @@ package guid_test
 import (
 	"github.com/gogf/gf/container/gset"
 	"github.com/gogf/gf/util/guid"
-	"sync"
 	"testing"
 
 	"github.com/gogf/gf/test/gtest"
@@ -33,25 +32,3 @@ func Test_S_Data(t *testing.T) {
 		t.Assert(len(guid.S([]byte("123"))), 32)
 	})
 }
-
-func Test_I(t *testing.T) {
-	gtest.C(t, func(t *gtest.T) {
-		var (
-			set = gset.NewSet(true)
-			wg  = sync.WaitGroup{}
-			ch  = make(chan struct{})
-		)
-		wg.Add(10)
-		for i := 0; i < 10; i++ {
-			go func() {
-				<-ch
-				for i := 0; i < 100000; i++ {
-					t.Assert(set.AddIfNotExist(guid.I()), true)
-				}
-				wg.Done()
-			}()
-		}
-		close(ch)
-		wg.Wait()
-	})
-}