The flow table driven by motor is especially used to measure the transportable moisture limit of drybulk cargo. The whole equipment consists of three parts: mechanical part, hydraulic system and electric control system. By using motor, the horse power becomes bigger, the equipment can be used for a variety of drybulk cargos. It possesses simple construction, reliable control and convenient operation. The composition of mechanical part, the mounting and the lubrication of equipment, the principle and control of the hydraulic system were illustrated.