diff --git a/byteutil/util.go b/byteutil/util.go
new file mode 100644
index 0000000..01f2de6
--- /dev/null
+++ b/byteutil/util.go
@@ -0,0 +1,44 @@
+package byteutil
+
+import (
+	"bytes"
+	"encoding/binary"
+)
+
+// IntToBytes 将int转换为[]byte
+func IntToBytes(n int) []byte {
+	data := int64(n)
+	byteBuf := bytes.NewBuffer([]byte{})
+	_ = binary.Write(byteBuf, binary.BigEndian, data)
+	return byteBuf.Bytes()
+}
+
+// BytesToInt 将[]byte转换为int
+func BytesToInt(bys []byte) int {
+	byteBuf := bytes.NewBuffer(bys)
+	var data int64
+	_ = binary.Read(byteBuf, binary.BigEndian, &data)
+	return int(data)
+}
+
+// ByteToLower lowers a byte
+func ByteToLower(b byte) byte {
+	if b <= '\u007F' {
+		if 'A' <= b && b <= 'Z' {
+			b += 'a' - 'A'
+		}
+		return b
+	}
+	return b
+}
+
+// ByteToUpper upper a byte
+func ByteToUpper(b byte) byte {
+	if b <= '\u007F' {
+		if 'a' <= b && b <= 'z' {
+			b -= 'a' - 'A'
+		}
+		return b
+	}
+	return b
+}
diff --git a/byteutil/util_test.go b/byteutil/util_test.go
new file mode 100644
index 0000000..add4259
--- /dev/null
+++ b/byteutil/util_test.go
@@ -0,0 +1,11 @@
+package byteutil
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestIntToBytes(t *testing.T) {
+	fmt.Println(IntToBytes(1))
+	fmt.Println(BytesToInt(IntToBytes(1)))
+}
diff --git a/entgo/go.mod b/entgo/go.mod
index ceb4b09..957a87f 100644
--- a/entgo/go.mod
+++ b/entgo/go.mod
@@ -6,7 +6,7 @@ require (
 	entgo.io/contrib v0.4.5
 	entgo.io/ent v0.12.4
 	github.com/go-kratos/kratos/v2 v2.7.1
-	github.com/google/uuid v1.3.1
+	github.com/google/uuid v1.4.0
 	github.com/stretchr/testify v1.8.4
 	github.com/tx7do/go-utils v1.1.0
 )
diff --git a/entgo/go.sum b/entgo/go.sum
index 9f57237..5ae9ccd 100644
--- a/entgo/go.sum
+++ b/entgo/go.sum
@@ -29,6 +29,7 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
 github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.4.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/hashicorp/hcl/v2 v2.19.1 h1://i05Jqznmb2EXqa39Nsvyan2o5XyMowW5fnCKW5RPI=
 github.com/hashicorp/hcl/v2 v2.19.1/go.mod h1:ThLC89FV4p9MPW804KVbe/cEXoQ8NZEh+JtMeeGErHE=
 github.com/jhump/protoreflect v1.15.3 h1:6SFRuqU45u9hIZPJAoZ8c28T3nK64BNdp9w6jFonzls=
diff --git a/go.mod b/go.mod
index 2e1858b..d5769a1 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/tx7do/go-utils
 go 1.20
 
 require (
+	github.com/google/uuid v1.4.0
 	github.com/sony/sonyflake v1.2.0
 	github.com/stretchr/testify v1.8.4
 	golang.org/x/crypto v0.14.0
diff --git a/go.sum b/go.sum
index 6979d10..7df99e1 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,8 @@
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/uuid v1.4.0 h1:MtMxsa51/r9yyhkyLsVeVt0B+BGQZzpQiTQ4eHZ8bc4=
+github.com/google/uuid v1.4.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
diff --git a/uuid/test_trans.go b/uuid/test_trans.go
new file mode 100644
index 0000000..3e2ae66
--- /dev/null
+++ b/uuid/test_trans.go
@@ -0,0 +1,7 @@
+package uuid
+
+import "testing"
+
+func TestUUID(t *testing.T) {
+
+}
diff --git a/uuid/trans.go b/uuid/trans.go
new file mode 100644
index 0000000..3cd0cf6
--- /dev/null
+++ b/uuid/trans.go
@@ -0,0 +1,31 @@
+package uuid
+
+import (
+	"github.com/google/uuid"
+	"github.com/tx7do/go-utils/trans"
+)
+
+func ToUuidPtr(str *string) *uuid.UUID {
+	var id *uuid.UUID
+	if str != nil {
+		_id, err := uuid.Parse(*str)
+		if err != nil {
+			return nil
+		}
+		id = &_id
+	}
+	return id
+}
+
+func ToUuid(str string) uuid.UUID {
+	id, _ := uuid.Parse(str)
+	return id
+}
+
+func ToStringPtr(id *uuid.UUID) *string {
+	var strUUID *string
+	if id != nil {
+		strUUID = trans.String(id.String())
+	}
+	return strUUID
+}