diff --git a/client/client.py b/client/client.py
index 371a0069..7203ef90 100644
--- a/client/client.py
+++ b/client/client.py
@@ -49,11 +49,17 @@
 autologin = 1
 
 # BASE_URL is variant use to save the format of host and port 
-BASE_URL = 'http://' + HOST + ':'+ PORT + '/'
+if PORT == '80':
+    BASE_URL = 'http://' + HOST +  '/'
+else:
+    BASE_URL = 'http://' + HOST + ':'+ PORT + '/'
 
 def __reflash_url__():
 	global BASE_URL
-	BASE_URL = 'http://' + HOST + ':'+ PORT + '/'
+	if PORT == '80':
+		BASE_URL = 'http://' + HOST +  '/'
+	else:
+		BASE_URL = 'http://' + HOST + ':'+ PORT + '/'
 
 
 def __read_auto_inf__():
@@ -138,7 +144,7 @@ def on_pBtn_login_clicked(self):
 		"""
 		global HOST,PORT
 		# check whether the length of input host and port is allowable
-		if 7<len(self.lEd_host.text())<16 :
+		if 7<len(self.lEd_host.text())<50 :
 			HOST = self.lEd_host.text()
 			PORT = self.lEd_port.text()
 			__reflash_url__()
diff --git a/client/login_screen.ui b/client/login_screen.ui
index 831537ee..d2f5eda3 100644
--- a/client/login_screen.ui
+++ b/client/login_screen.ui
@@ -151,7 +151,7 @@ padding:2px 4px;
 color: rgb(80, 76, 77);</string>
        </property>
        <property name="maxLength">
-        <number>15</number>
+        <number>50</number>
        </property>
        <property name="alignment">
         <set>Qt::AlignCenter</set>