A set of mechanized conveying system for bus body painting process was designed,which could allow the bus body automatic scheduling and transfer in each station of painting workshop.This conveyor system is divided into two floors,using skids as the transport carriers.The first floor is the main equipment placement floor,and the second floor is the empty skid return line,including rolling beds,transport car,90°turning rolling beds,empty skid rolling beds,elevators,automatic control system,information collection and display system.