Abstract. Traditional PVC floor detecting is done by workers' handwork, which is hard and inefficient. So studying and designing a set of control system which is based on PLC for PVC floor detecting conveyor device. The PVC floor detecting conveyor device consists of loading, conveying and unloading and other parts. To make the whole system works in a coordinate and controllable status. Firstly, by using double layer hydraulic scissors lift to realize the lifting and stratified translational control of lifting platform; secondly, with the use of photoelectric switches, counters and other components, station transport algorithm helps the process of PVC floor detecting conveyor; Finally, according cutting control requirements of stacker, the PLC auto-control and speed optimization can be done by layered multiple stacking. Thus automated loading, conveying and unloading process are come true, greatly reducing the labor intensity and improving production efficiency.