Pallet rack system is one of the most widely used rack system. Also known as the crossbeam type goods shelves, or the cargo shelf, usually heavy shelf, in a variety of domestic storage shelves system is most common. According to the warehouse roof along the highly effective and forklift fork of maximum high determine shelf heights must first container unit of work is goods packing and weight and other characteristics were set, tray to determine the type, specification, size, and single supporting load and high stack (single supporting the weight of the goods general less than 2000kg), and thus determine the shelf unit span, depth, and the distance between layers. Unit shelf span is generally less than 4m, depth within 1.5m, low, high warehouse shelf height is generally within 12M, super high warehouse shelves height is generally within 30m (such warehouses are automated warehouse, the shelf is composed of several sections of 12m. Such warehouse, low, high warehouse is mostly used forward type battery forklift, counterbalanced forklift truck, three to the forklift to access and shelf shorter also available electric pile high machine, ultra high warehouse stacker for access. Pallet rack with high utilization rate, convenient access, with computer management or control, tray type shelf can meet the requirements of modern logistics system. The application and development of pallet rack system promotes the rapid development of the industry.