The box tray is a tray with side panels on all four sides, some have a top plate on the box, and some have no top plate. The box board has three types: fixed type, foldable type and detachable type. The surrounding fences are slab type, grid type and net type. Therefore, the fence type tray trays are also called cage trays or warehouse cages. The box tray has strong protection ability to prevent collapse and cargo damage; it can be loaded with goods that are not stable and can be stacked stably, and has a wide application range.