diff --git a/Plugins/portscan.go b/Plugins/portscan.go
index 36637d6..efa54c1 100644
--- a/Plugins/portscan.go
+++ b/Plugins/portscan.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/shadow1ng/fscan/common"
 	"net"
+	"sort"
 	"strconv"
 	"sync"
 	"time"
@@ -19,22 +20,21 @@ func PortScan(hostslist []string, ports string, timeout int64) []string {
 	probePorts := common.ParsePort(ports)
 	noPorts := common.ParsePort(common.NoPorts)
 	if len(noPorts) > 0 {
-		var tmpPorts []int
+		temp := map[int]struct{}{}
 		for _, port := range probePorts {
-			var flag bool
-		nport:
-			for _, noport := range noPorts {
-				if port == noport {
-					flag = true
-					break nport
-				}
-			}
-			if flag {
-				continue
-			}
-			tmpPorts = append(tmpPorts, port)
+			temp[port] = struct{}{}
 		}
-		probePorts = tmpPorts
+
+		for _, port := range noPorts {
+			delete(temp, port)
+		}
+
+		var newDatas []int
+		for port, _ := range temp {
+			newDatas = append(newDatas, port)
+		}
+		probePorts = newDatas
+		sort.Ints(probePorts)
 	}
 	workers := common.Threads
 	Addrs := make(chan Addr, len(hostslist)*len(probePorts))
diff --git a/common/ParseIP.go b/common/ParseIP.go
index 94f5065..1bf40b2 100644
--- a/common/ParseIP.go
+++ b/common/ParseIP.go
@@ -7,6 +7,7 @@ import (
 	"net"
 	"os"
 	"regexp"
+	"sort"
 	"strconv"
 	"strings"
 )
@@ -21,35 +22,54 @@ var ParseIPErr = errors.New(" host parsing error\n" +
 	"192.168.1.1-192.168.255.255\n" +
 	"192.168.1.1-255")
 
-func ParseIP(ip string, filename string) (hosts []string, err error) {
-
+func ParseIP(ip string, filename string, nohost string) (hosts []string, err error) {
 	if ip != "" {
-		hosts, err = ParseIPs(ip)
+		hosts = ParseIPs(ip)
 	}
 	if filename != "" {
 		var filehost []string
 		filehost, _ = Readipfile(filename)
 		hosts = append(hosts, filehost...)
 	}
+
+	if nohost != "" {
+		nohosts := ParseIPs(nohost)
+		if len(nohosts) > 0 {
+			temp := map[string]struct{}{}
+			for _, host := range hosts {
+				temp[host] = struct{}{}
+			}
+
+			for _, host := range nohosts {
+				delete(temp, host)
+			}
+
+			var newDatas []string
+			for host, _ := range temp {
+				newDatas = append(newDatas, host)
+			}
+			hosts = newDatas
+			sort.Strings(hosts)
+		}
+	}
 	hosts = RemoveDuplicate(hosts)
 	return hosts, err
 }
 
-func ParseIPs(ip string) (hosts []string, err error) {
+func ParseIPs(ip string) (hosts []string) {
+	var err error
 	if strings.Contains(ip, ",") {
 		IPList := strings.Split(ip, ",")
 		var ips []string
 		for _, ip := range IPList {
 			ips, err = ParseIPone(ip)
-			CheckErr(ip, err)
 			hosts = append(hosts, ips...)
 		}
-		return hosts, err
 	} else {
 		hosts, err = ParseIPone(ip)
-		CheckErr(ip, err)
-		return hosts, err
 	}
+	CheckErr(ip, err)
+	return hosts
 }
 
 func ParseIPone(ip string) ([]string, error) {
@@ -189,8 +209,7 @@ func Readipfile(filename string) ([]string, error) {
 	for scanner.Scan() {
 		text := strings.TrimSpace(scanner.Text())
 		if text != "" {
-			host, err := ParseIPs(text)
-			CheckErr(text, err)
+			host := ParseIPs(text)
 			content = append(content, host...)
 		}
 	}
@@ -198,7 +217,7 @@ func Readipfile(filename string) ([]string, error) {
 }
 
 func RemoveDuplicate(old []string) []string {
-	result := make([]string, 0, len(old))
+	result := []string{}
 	temp := map[string]struct{}{}
 	for _, item := range old {
 		if _, ok := temp[item]; !ok {
diff --git a/common/ParsePort.go b/common/ParsePort.go
index c8e4645..c9cb328 100644
--- a/common/ParsePort.go
+++ b/common/ParsePort.go
@@ -5,8 +5,10 @@ import (
 	"strings"
 )
 
-func ParsePort(ports string) []int {
-	var scanPorts []int
+func ParsePort(ports string) (scanPorts []int) {
+	if ports == "" {
+		return
+	}
 	slices := strings.Split(ports, ",")
 	for _, port := range slices {
 		port = strings.Trim(port, " ")
@@ -39,7 +41,7 @@ func ParsePort(ports string) []int {
 }
 
 func removeDuplicate(old []int) []int {
-	result := make([]int, 0, len(old))
+	result := []int{}
 	temp := map[int]struct{}{}
 	for _, item := range old {
 		if _, ok := temp[item]; !ok {
diff --git a/common/config.go b/common/config.go
index ef62973..3075ade 100644
--- a/common/config.go
+++ b/common/config.go
@@ -92,5 +92,6 @@ var (
 	UrlFile       string
 	Urls          []string
 	NoPorts       string
+	NoHosts       string
 	SC            string
 )
diff --git a/common/flag.go b/common/flag.go
index f0f6467..2387e71 100644
--- a/common/flag.go
+++ b/common/flag.go
@@ -19,6 +19,7 @@ func Banner() {
 func Flag(Info *HostInfo) {
 	Banner()
 	flag.StringVar(&Info.Host, "h", "", "IP address of the host you want to scan,for example: 192.168.11.11 | 192.168.11.11-255 | 192.168.11.11,192.168.11.12")
+	flag.StringVar(&NoHosts, "hn", "", "the hosts no scan,as: -hn 192.168.1.1/24")
 	flag.StringVar(&Info.Ports, "p", DefaultPorts, "Select a port,for example: 22 | 1-65535 | 22,80,3306")
 	flag.StringVar(&NoPorts, "pn", "", "the ports no scan,as: -pn 445")
 	flag.StringVar(&Info.Command, "c", "", "exec command (ssh)")