Transmission ratio is an important design parameter of multistage conveying mechanism,which is also the main influence factor of conveying efficiency.A roller conveyor mechanism model of a tile production line was constructed.Based on the theory of multirigid body system dynamics,the transport process of the tiles on the convey mechanism was simulated by ADAMS.The influence of the transmission rate on the transport condition of the tile was obtained.In addition,two criteria for maximum rotation angle and continuous transport were proposed for stacking and deflection delay problems in the process of tiles.On this basis,the optimal transmission rate of the tile conveyor was obtained.The results show that the optimization results are correct and provide a certain reference value and theoretical basis for the optimal design of the transmission rate of the convey mechanism,and have a strong practicality.