diff --git a/proxypool/utils/proxy.py b/proxypool/utils/proxy.py
index 294033fc..79cc27fb 100644
--- a/proxypool/utils/proxy.py
+++ b/proxypool/utils/proxy.py
@@ -5,7 +5,10 @@ def is_valid_proxy(data):
     """
     check this string is within proxy format
     """
-    if data.__contains__(':'):
+    if is_auth_proxy(data):
+        host, port = extract_auth_proxy(data)
+        return is_ip_valid(host) and is_port_valid(port)
+    elif data.__contains__(':'):
         ip = data.split(':')[0]
         port = data.split(':')[1]
         return is_ip_valid(ip) and is_port_valid(port)
@@ -17,6 +20,8 @@ def is_ip_valid(ip):
     """
     check this string is within ip format
     """
+    if is_auth_proxy(ip):
+        ip = ip.split('@')[1]
     a = ip.split('.')
     if len(a) != 4:
         return False
@@ -48,9 +53,36 @@ def convert_proxy_or_proxies(data):
             # skip invalid item
             item = item.strip()
             if not is_valid_proxy(item): continue
-            host, port = item.split(':')
+            if is_auth_proxy(item):
+                host, port = extract_auth_proxy(item)
+            else:
+                host, port = item.split(':')
             result.append(Proxy(host=host, port=int(port)))
         return result
     if isinstance(data, str) and is_valid_proxy(data):
-        host, port = data.split(':')
+        if is_auth_proxy(data):
+            host, port = extract_auth_proxy(data)
+        else:
+            host, port = data.split(':')
         return Proxy(host=host, port=int(port))
+
+
+def is_auth_proxy(data: str) -> bool:
+    return '@' in data
+
+
+def extract_auth_proxy(data: str) -> (str, str):
+    """
+    extract host and port from a proxy with authentication
+    """
+    auth = data.split('@')[0]
+    ip_port = data.split('@')[1]
+    ip = ip_port.split(':')[0]
+    port = ip_port.split(':')[1]
+    host = auth + '@' + ip
+    return host, port
+
+
+if __name__ == '__main__':
+    proxy = 'test1234:test5678.@117.68.216.212:32425'
+    print(extract_auth_proxy(proxy))