Warehouse mezzanine racks are to build an intermediate loft on the existing work site or shelf to increase the storage space. It can be used as a second and third floor loft. It is suitable to access some light foam and small and medium-sized goods. It is suitable for multi-variety or large quantities. Multi-variety small batches of goods, manual access to goods. Goods are usually sent to the second and third floors by forklifts, hydraulic lifts or freight elevators, and then sent to a certain location by light trolleys or hydraulic pallet trucks. Applicable to the case of high warehouse, small cargo, manual access, and large storage.