The CAN Bus is a safe,reliable field bus,CAN Bus technology introduced in the Metro Platform Screen Doors Control System can achieve real-time exchange of data sharing and control signals,so that not only the utilization rate of the signal is improved,but also the system stability and timeliness is enhanced.Ths article describes the function and structure of the Metro Platform Screen Doors Control System,nanlyzes and studies the composition of the characteristics,structre and intelligent node in the CAN bus,and constructs Control System of Metro Platform Screen Door based on CAN Bus.