Stackers can be divided into light, heavy and mini loads according to the load capacity, high and low stackers according to the loading height, and single-depth and double-depth stackers according to the loading depth. The rail roadway stacker is mainly composed of the machine body (including column, upper beam, and lower beam), cargo platform, horizontal running mechanism, lifting mechanism, fork mechanism, and electrical control device. The stacker is controlled by PLC and driven by frequency conversion speed regulation. Communication between the stacker and ground equipment through infrared optical communication. Each PLC and the monitoring computer form a network through a bus connection. There is an operator interface on the stacker. The stacker can be operated locally or online by the upper computer. The monitoring computer and the management computer are connected via TCP/IP protocol, and the PLC and the inverter are connected via Profibus.