diff --git a/datetime/datetime.go b/datetime/datetime.go
index 178a090..9009160 100644
--- a/datetime/datetime.go
+++ b/datetime/datetime.go
@@ -96,6 +96,18 @@ func GetNowDateTime() string {
 	return time.Now().Format("2006-01-02 15:04:05")
 }
 
+// GetTodayStartTime return the start time of today, format: yyyy-mm-dd 00:00:00.
+// Play: todo
+func GetTodayStartTime() string {
+	return time.Now().Format("2006-01-02") + " 00:00:00"
+}
+
+// GetTodayEndTime return the end time of today, format: yyyy-mm-dd 23:59:59.
+// Play: todo
+func GetTodayEndTime() string {
+	return time.Now().Format("2006-01-02") + " 23:59:59"
+}
+
 // GetZeroHourTimestamp return timestamp of zero hour (timestamp of 00:00).
 // Play: https://go.dev/play/p/QmL2oIaGE3q
 func GetZeroHourTimestamp() int64 {
diff --git a/datetime/datetime_test.go b/datetime/datetime_test.go
index 3cbacbe..61232d0 100644
--- a/datetime/datetime_test.go
+++ b/datetime/datetime_test.go
@@ -91,6 +91,18 @@ func TestGetNowDateTime(t *testing.T) {
 	assert.Equal(expected, GetNowDateTime())
 }
 
+func TestGetTodayStartTime(t *testing.T) {
+	assert := internal.NewAssert(t, "TestGetTodayStartTime")
+	expected := time.Now().Format("2006-01-02") + " 00:00:00"
+	assert.Equal(expected, GetTodayStartTime())
+}
+
+func TestGetTodayEndTime(t *testing.T) {
+	assert := internal.NewAssert(t, "TestGetTodayEndTime")
+	expected := time.Now().Format("2006-01-02") + " 23:59:59"
+	assert.Equal(expected, GetTodayEndTime())
+}
+
 func TestFormatTimeToStr(t *testing.T) {
 	assert := internal.NewAssert(t, "TestFormatTimeToStr")
 
diff --git a/docs/datetime.md b/docs/datetime.md
index 0087ed8..6d29666 100644
--- a/docs/datetime.md
+++ b/docs/datetime.md
@@ -42,6 +42,8 @@ import (
 -   [GetNowDate](#GetNowDate)
 -   [GetNowTime](#GetNowTime)
 -   [GetNowDateTime](#GetNowDateTime)
+-   [GetTodayStartTime](#GetTodayStartTime)
+-   [GetTodayEndTime](#GetTodayEndTime)
 -   [GetZeroHourTimestamp](#GetZeroHourTimestamp)
 -   [GetNightTimestamp](#GetNightTimestamp)
 -   [FormatTimeToStr](#FormatTimeToStr)
@@ -643,14 +645,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     currentDate := datetime.GetNowDate()
-
     fmt.Println(currentDate)
 
     // Output:
@@ -675,14 +674,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     currentTime := datetime.GetNowTime()
-
     fmt.Println(currentTime) // 15:57:33
 
     // Output:
@@ -707,14 +703,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     current := datetime.GetNowDateTime()
-
     fmt.Println(current)
 
     // Output:
@@ -722,6 +715,64 @@ func main() {
 }
 ```
 
+### <span id="GetTodayStartTime">GetTodayStartTime</span>
+
+<p>Return the start time of today, format: yyyy-mm-dd 00:00:00.</p>
+
+<b>Signature:</b>
+
+```go
+func GetTodayStartTime() string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    startTime := datetime.GetTodayStartTime()
+    fmt.Println(startTime)
+
+    // Output:
+    // 2023-06-29 00:00:00
+}
+```
+
+### <span id="GetTodayEndTime">GetTodayEndTime</span>
+
+<p>Return the end time of today, format: yyyy-mm-dd 23:59:59.</p>
+
+<b>Signature:</b>
+
+```go
+func GetTodayEndTime() string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    endTime := datetime.GetTodayEndTime()
+    fmt.Println(endTime)
+
+    // Output:
+    // 2023-06-29 23:59:59
+}
+```
+
 ### <span id="GetZeroHourTimestamp">GetZeroHourTimestamp</span>
 
 <p>Return timestamp of zero hour (timestamp of 00:00).</p>
@@ -739,14 +790,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     zeroTime := datetime.GetZeroHourTimestamp()
-
     fmt.Println(zeroTime)
 
     // Output:
@@ -771,14 +819,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     nightTime := datetime.GetNightTimestamp()
-
     fmt.Println(nightTime)
 
     // Output:
diff --git a/docs/datetime_zh-CN.md b/docs/datetime_zh-CN.md
index 8b9e901..9f1775e 100644
--- a/docs/datetime_zh-CN.md
+++ b/docs/datetime_zh-CN.md
@@ -41,6 +41,8 @@ import (
 -   [GetNowDate](#GetNowDate)
 -   [GetNowTime](#GetNowTime)
 -   [GetNowDateTime](#GetNowDateTime)
+-   [GetTodayStartTime](#GetTodayStartTime)
+-   [GetTodayEndTime](#GetTodayEndTime)
 -   [GetZeroHourTimestamp](#GetZeroHourTimestamp)
 -   [GetNightTimestamp](#GetNightTimestamp)
 -   [FormatTimeToStr](#FormatTimeToStr)
@@ -643,14 +645,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     currentDate := datetime.GetNowDate()
-
     fmt.Println(currentDate)
 
     // Output:
@@ -675,15 +674,12 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     currentTime := datetime.GetNowTime()
-
-    fmt.Println(currentTime) // 15:57:33
+    fmt.Println(currentTime)
 
     // Output:
     // 15:57:33
@@ -707,14 +703,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     current := datetime.GetNowDateTime()
-
     fmt.Println(current)
 
     // Output:
@@ -722,6 +715,64 @@ func main() {
 }
 ```
 
+### <span id="GetTodayStartTime">GetTodayStartTime</span>
+
+<p>返回当天开始时间， 格式: yyyy-mm-dd 00:00:00.</p>
+
+<b>函数签名:</b>
+
+```go
+func GetTodayStartTime() string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    startTime := datetime.GetTodayStartTime()
+    fmt.Println(startTime)
+
+    // Output:
+    // 2023-06-29 00:00:00
+}
+```
+
+### <span id="GetTodayEndTime">GetTodayEndTime</span>
+
+<p>返回当天结束时间，格式: yyyy-mm-dd 23:59:59.</p>
+
+<b>函数签名:</b>
+
+```go
+func GetTodayEndTime() string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    endTime := datetime.GetTodayEndTime()
+    fmt.Println(endTime)
+
+    // Output:
+    // 2023-06-29 23:59:59
+}
+```
+
 ### <span id="GetZeroHourTimestamp">GetZeroHourTimestamp</span>
 
 <p>获取零点时间戳(timestamp of 00:00)</p>
@@ -739,14 +790,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     zeroTime := datetime.GetZeroHourTimestamp()
-
     fmt.Println(zeroTime)
 
     // Output:
@@ -771,14 +819,11 @@ package main
 
 import (
     "fmt"
-    "time"
     "github.com/duke-git/lancet/v2/datetime"
 )
 
 func main() {
-    now := time.Now()
     nightTime := datetime.GetNightTimestamp()
-
     fmt.Println(nightTime)
 
     // Output: