The Mezzanine rack is based on the multi-layer shelf rack, and the wood, checkered board, steel plate and other materials are used as the floor, which can be flexibly designed into two layers and multi-layers. It is suitable for small packaging of hardware tools, electronic equipment, mechanical parts and other items. It can store more varieties and small batches of goods, and can make full use of the space. It is suitable for the situation of limited space, wide variety and small quantity, and it can increase the utilization rate several times on the existing field.