It consists of a locking unit, an assembly unit, a belt drive unit and a corner unit. Combine CAM drive and belt transmission system. The modular system design makes the installation of the equipment extremely convenient and reduces the manual installation cost. The locking unit is mainly composed of a camshaft and a load car. Every time the camshaft rotates, the load car advances a step. The main function is to realize the synchronous transmission and positioning of the load car. The assembly unit can be independently controlled and the assembly residence time can be adjusted. The belt drive part is used for the transmission of the carriage between the assembly stations, and the length of the belt can be determined according to customer requirements. The equipment has high positioning accuracy and short conveying time, which can greatly improve work efficiency. It has high reliability and practicality.