The shelf is widely used cooperating with mechanized transport equipments, and has dual function of trnasporting and handling, can be used as a tray and stacked 3 layers. It has big payload range 800kg/layer～1,500kg/layer, can be folded to save space when free. The fixed frame is divided into two types as durable type and detachable type. The durable frame is strong and long-used, and welded by structural steel;detachable frame is consisted of a base and four pillars, the base is welded by structural steel, the pillar is made by square steel that is strong and durable.