diff --git a/tool/cm_tool/Common.py b/tool/cm_tool/Common.py
index 1763e4a..a4aa83f 100644
--- a/tool/cm_tool/Common.py
+++ b/tool/cm_tool/Common.py
@@ -60,3 +60,19 @@ def checkXMLFile(xmlFile):
         CMLog.exitWithError(ErrorCode.GAUSS_502["GAUSS_50210"] % "xmlFile")
     if not os.access(xmlFile, os.R_OK):
         CMLog.exitWithError(ErrorCode.GAUSS_501["GAUSS_50100"] % (xmlFile, "current user"))
+
+def checkHostsTrust(hosts, localhost = ""):
+    """
+    check trust between current host and the given hosts
+    """
+    hostsWithoutTrust = []
+    for host in hosts:
+        if host == localhost:
+            continue
+        checkTrustCmd = "ssh -o ConnectTimeout=3 -o ConnectionAttempts=5 -o PasswordAuthentication=no " \
+            "-o StrictHostKeyChecking=no %s 'pwd > /dev/null'" % host
+        status, output = subprocess.getstatusoutput(checkTrustCmd)
+        if status != 0:
+            hostsWithoutTrust.append(host)
+    if hostsWithoutTrust != []:
+        CMLog.exitWithError(ErrorCode.GAUSS_511["GAUSS_51100"] % ','.join(hostsWithoutTrust))
diff --git a/tool/cm_tool/cm_install b/tool/cm_tool/cm_install
index 399bd9f..a2a117f 100644
--- a/tool/cm_tool/cm_install
+++ b/tool/cm_tool/cm_install
@@ -46,7 +46,7 @@ class Install:
         self.toolPath = ""
         self.tmpPath = ""
         self.cmDirs = []
-        self.hostNames = []
+        self.hostnames = []
         self.localhostName = ""
         self.cmpkg = ""
 
@@ -207,23 +207,11 @@ General options:
             CMLog.exitWithError(ErrorCode.GAUSS_500["GAUSS_50024"] % 'cmServerPortBase')
         if cmDict['cmServerPortStandby'] != "" and not cmDict['cmServerPortStandby'].isdigit():
             CMLog.exitWithError(ErrorCode.GAUSS_500["GAUSS_50024"] % 'cmServerPortStandby')
-        if len(self.hostNames) != len(self.cmDirs):
+        if len(self.hostnames) != len(self.cmDirs):
             CMLog.exitWithError("\"cmDir\" of all nodes must be provided.")
 
-    def _checkTrust(self, host):
-        """
-        check trust between current host and the given host
-        """
-        checkTrustCmd = "source %s; pssh -s -H %s 'pwd'" % (self.envFile, host)
-        status, output = subprocess.getstatusoutput(checkTrustCmd)
-        return status
-
     def checkHostTrust(self):
-        for host in self.hostNames:
-            if host == self.localhostName:
-                continue
-            if self._checkTrust(host) != 0:
-                CMLog.exitWithError(ErrorCode.GAUSS_511["GAUSS_51100"] % host)
+        checkHostsTrust(self.hostnames, self.localhostName)
 
     def initLogger(self):
         logPath = os.path.join(self.gaussLog, "cm", "cm_tool")
diff --git a/tool/cm_tool/cm_uninstall b/tool/cm_tool/cm_uninstall
index 218bda6..a1f007a 100644
--- a/tool/cm_tool/cm_uninstall
+++ b/tool/cm_tool/cm_uninstall
@@ -247,14 +247,18 @@ General options:
         if os.getuid() == 0:
             CMLog.exitWithError(ErrorCode.GAUSS_501["GAUSS_50105"])
 
+    def checkHostTrust(self):
+        checkHostsTrust(self.hostnames, self.localhostName)
+
     def run(self):
         self.checkExeUser()
         self.parseCommandLine()
         self.checkParam()
         self.checkXMLContainCMInfo()
         self.initLogger()
-        self.logger.log("Start to uninstall CM.")
         self.getHostnames()
+        self.checkHostTrust()
+        self.logger.log("Start to uninstall CM.")
         self.getCMDataPaths()
         self.cancleMonitorCrontab()
         self.stopCMProcess()