diff --git a/spug_api/apps/host/views.py b/spug_api/apps/host/views.py
index c8e543f..3d497b1 100644
--- a/spug_api/apps/host/views.py
+++ b/spug_api/apps/host/views.py
@@ -149,11 +149,7 @@ def valid_ssh(hostname, port, username, password, with_expect=True):
     cli = SSH(hostname, port, username, private_key)
     if password:
         _cli = SSH(hostname, port, username, password=str(password))
-        code, out = _cli.exec_command('mkdir -p -m 700 ~/.ssh && \
-                echo %r >> ~/.ssh/authorized_keys && \
-                chmod 600 ~/.ssh/authorized_keys' % public_key)
-        if code != 0:
-            raise Exception(f'add public key error: {out!r}')
+        _cli.add_public_key(public_key)
     try:
         cli.ping()
     except BadAuthenticationType:
diff --git a/spug_api/apps/monitor/executors.py b/spug_api/apps/monitor/executors.py
index 001a496..3487166 100644
--- a/spug_api/apps/monitor/executors.py
+++ b/spug_api/apps/monitor/executors.py
@@ -34,9 +34,9 @@ def host_executor(host, pkey, command):
         cli = SSH(host.hostname, host.port, host.username, pkey=pkey)
         exit_code, out = cli.exec_command(command)
         if exit_code == 0:
-            return True, out.decode() or '检测状态正常'
+            return True, out or '检测状态正常'
         else:
-            return False, out.decode() or f'退出状态码：{exit_code}'
+            return False, out or f'退出状态码：{exit_code}'
     except Exception as e:
         return False, f'异常信息：{e}'
 
diff --git a/spug_api/apps/schedule/executors.py b/spug_api/apps/schedule/executors.py
index 18a646a..023badf 100644
--- a/spug_api/apps/schedule/executors.py
+++ b/spug_api/apps/schedule/executors.py
@@ -27,7 +27,7 @@ def host_executor(q, host, pkey, command):
     try:
         cli = SSH(host.hostname, host.port, host.username, pkey=pkey)
         exit_code, out = cli.exec_command(command)
-        out = out.decode() if out else None
+        out = out if out else None
     except AuthenticationException:
         out = 'ssh authentication fail'
     except socket.error as e:
diff --git a/spug_api/libs/ssh.py b/spug_api/libs/ssh.py
index a587efd..63ff94a 100644
--- a/spug_api/libs/ssh.py
+++ b/spug_api/libs/ssh.py
@@ -35,7 +35,7 @@ class SSH:
         chmod 600 ~/.ssh/authorized_keys'
         code, out = self.exec_command(command)
         if code != 0:
-            raise Exception(out)
+            raise Exception(f'add public key error: {out}')
 
     def ping(self):
         with self:
@@ -65,8 +65,8 @@ class SSH:
                 str_env = ' '.join(f"{k}='{v}'" for k, v in environment.items())
                 command = f'export {str_env} && {command}'
             chan.exec_command(command)
-            out = chan.makefile("r", -1)
-            return chan.recv_exit_status(), out.read()
+            stdout = chan.makefile("rb", -1)
+            return chan.recv_exit_status(), self._decode(stdout.read())
 
     def exec_command_with_stream(self, command, timeout=1800, environment=None):
         command = 'set -e\n' + command
@@ -78,12 +78,12 @@ class SSH:
                 str_env = ' '.join(f"{k}='{v}'" for k, v in environment.items())
                 command = f'export {str_env} && {command}'
             chan.exec_command(command)
-            stdout = chan.makefile("r", -1)
+            stdout = chan.makefile("rb", -1)
             out = stdout.readline()
             while out:
-                yield chan.exit_status, out
+                yield chan.exit_status, self._decode(out)
                 out = stdout.readline()
-            yield chan.recv_exit_status(), out
+            yield chan.recv_exit_status(), self._decode(out)
 
     def put_file_by_fl(self, fl, remote_path, callback=None):
         with self as cli:
@@ -100,6 +100,12 @@ class SSH:
             sftp = cli.open_sftp()
             sftp.remove(path)
 
+    def _decode(self, out: bytes):
+        try:
+            return out.decode()
+        except UnicodeDecodeError:
+            return out.decode('GBK')
+
     def __enter__(self):
         if self.client is not None:
             raise RuntimeError('Already connected')