Mobile shelves are a combination of fixed shelves and movable chassis components. The mobile shelves are driven by manual adjustment of handwheels or motors. Each row of shelves can move directionally on the track. It has an independent transmission device that fully saves space and prevents damage. Dust and other advantages. This shelf is widely used in archives, libraries, corporate reference rooms, etc. of enterprises and institutions. The shelves can be divided into mobile light shelf type and mobile heavy pallet type.