diff --git a/README.md b/README.md
index 1a9eaf8..f4fb256 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,9 @@ http benchmark tool to ran out your server bandwidth.
 
 - random User-Agent on every Request
 - customizable Referer Url,
+- customizable header,
 - concurrent routines as you wish, depends on you server performance.
-- add http post mode
+- http post mode
 - specify multi target ip, or resolved by system dns.
 - randomly X-Forwarded-For and X-Real-IP (default on).
 
@@ -25,6 +26,8 @@ http benchmark tool to ran out your server bandwidth.
           target url (default "https://baidu.com")
     -i string
           custom ip address for that domain, multiple addresses automatically will be assigned randomly
+    -H http header pattern
+          http header pattern, use Random with number prefix will generate random string, same key will be overwritten
     -f string
           randomized X-Forwarded-For and X-Real-IP address
     -p string
@@ -37,10 +40,16 @@ http benchmark tool to ran out your server bandwidth.
 
 ## Advanced example
     # send request to 10.0.0.1 and 10.0.0.2 for https://target.url with 32 concurrent threads 
-    # and refer is https://refer.url
-    ./webBenchmark_linux_x64 -c 32 -s https://target.url -r https://refer.url -i 10.0.0.1 -i 10.0.0.2 
+    # and refer is https://refer.url 
+    ./webBenchmark_linux_x64 -c 32 -s https://target.url -r https://refer.url -i 10.0.0.1 -i 10.0.0.2
+    # send request to https://target.url with header regid:123 and sign:Random10
+    ./webBenchmark_linux_x64 -s https://target.url -H 'regid:123' -H 'sign:QpXDYHdVzB'
+    
+
+
+
+## LICENSE AND DISCLAIMER
 
-##LICENSE AND DISCLAIMER
 
 **1. Application.**
 
diff --git a/main.go b/main.go
index 35a3311..0aa5dec 100644
--- a/main.go
+++ b/main.go
@@ -13,6 +13,7 @@ import (
 	"math/rand"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -44,6 +45,33 @@ const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
 var SpeedQueue = list.New()
 var SpeedIndex uint64 = 0
+
+
+type header struct {
+	key, value string
+}
+
+type headersList []header
+
+func (h *headersList) String() string {
+	return fmt.Sprint(*h)
+}
+
+func (h *headersList) IsCumulative() bool {
+	return true
+}
+
+func (h *headersList) Set(value string) error {
+	res := strings.SplitN(value, ":", 2)
+	if len(res) != 2 {
+		return nil
+	}
+	*h = append(*h, header{
+		res[0], strings.Trim(res[1], " "),
+	})
+	return nil
+}
+
 type ipArray []string
 
 func (i *ipArray) String() string {
@@ -269,6 +297,27 @@ func goFun(Url string, postContent string, Referer string, XforwardFor bool, cus
 			request.Header.Add("X-Real-IP", randomip)
 		}
 
+		if len(headers)>0 {
+			for _, head := range headers {
+				headKey := head.key
+				headValue := head.value
+				if strings.HasPrefix(head.key,"Random") {
+					count, convErr := strconv.Atoi(strings.ReplaceAll(head.value, "Random", ""))
+					if convErr==nil {
+						headKey = RandStringBytesMaskImpr(count)
+					}
+				}
+				if strings.HasPrefix(head.value,"Random"){
+					count, convErr := strconv.Atoi(strings.ReplaceAll(head.value, "Random", ""))
+					if convErr==nil {
+						headValue = RandStringBytesMaskImpr(count)
+					}
+				}
+				request.Header.Del(headKey)
+				request.Header.Set(headKey, headValue)
+			}
+		}
+
 		resp, err2 := client.Do(request)
 		if err2 != nil {
 			continue
@@ -287,6 +336,7 @@ var referer = flag.String("r", "", "referer url")
 var xforwardfor = flag.Bool("f", true, "randomized X-Forwarded-For and X-Real-IP address")
 var TerminalWriter = goterminal.New(os.Stdout)
 var customIP ipArray
+var headers headersList
 
 func usage() {
 	fmt.Fprintf(os.Stderr,
@@ -309,6 +359,7 @@ webBenchmark -c 16 -s https://some.website -r https://referer.url
 
 func main() {
 	flag.Var(&customIP, "i", "custom ip address for that domain, multiple addresses automatically will be assigned randomly")
+	flag.Var(&headers, "H", "custom header")
 	flag.Usage = usage
 	flag.Parse()
 	if *h {