Abstract: With increasing development railroading,it was inevitably for a large number of high-speed railway transiting through settlement vulnerability areas underlying molsoil、cavities and karst region,where necessitated a real time monitoring system to alarm the risk of railway embankment deformation and settlement.To meet the demand of monitoring railway embankment deformation,this paper presented a forewarning system of railway embankment settlement,which was composed of a sensor,CAN bus,computer,data acquisition and analysis software,alarm and VGA transmission system.Engineering experiment practiced the function of real time monitoring and forewarning railway embankment deformation,with the feature of low cost,simple installation,high reliability and wide application.