diff --git a/tools/usr_mgr/README b/tools/usr_mgr/README
deleted file mode 100644
index f39218aa3a..0000000000
--- a/tools/usr_mgr/README
+++ /dev/null
@@ -1,5 +0,0 @@
-Create user and its password by run the following command:
-
-python usr_mgr.py
-
-The user and its password is saved in file 'passwd.csv'.
diff --git a/tools/usr_mgr/usr_mgr.py b/tools/usr_mgr/usr_mgr.py
deleted file mode 100644
index d1668dcb72..0000000000
--- a/tools/usr_mgr/usr_mgr.py
+++ /dev/null
@@ -1,56 +0,0 @@
-'''
-This file implements user management program. The user name and 
-its password is saved in csv file.
-'''
-
-import random
-from hashlib import sha1
-
-import csv
-
-class PasswordHash(object):
-    def __init__(self, password_):
-        self.salt = "".join(chr(random.randint(33, 127)) for x in range(64))
-        self.saltedpw = sha1((password_ + self.salt).encode()).hexdigest()
-
-    def check_password(self, password_):
-        """checks if the password is correct"""
-        return self.saltedpw == sha1((password_ + self.salt).encode()).hexdigest()
-
-# Note: a secure application would never store passwords in plaintext in the source code
-def check_username(name):
-    csvfile = open('passwd.csv')
-    ret = 0
-    reader = csv.reader(csvfile)
-    for row in reader:
-        if name == row[0]:
-            ret = 1
-            break
-    
-    csvfile.close()
-    return ret
-
-def save_info(name,pw,salt):
-    csvfile = open('passwd.csv', 'a')
-    writer = csv.writer(csvfile)
-    writer.writerow([name, pw, salt])
-    csvfile.close()
-
-def register():
-    flag = True
-    # create the file if it doesn't exist
-    csvfile = open('passwd.csv', "w")
-    csvfile.close()
-    while flag :
-        username = input("username:")
-        passwd = input("passwd:")
-        if check_username(username):
-             print("the usename already exist!")
-        else :
-            pwhash = PasswordHash(passwd)
-            save_info(username,pwhash.saltedpw, pwhash.salt)
-            print("register success!")
-            flag = False       
-
-register()
-