The pallet jack (pallet carrier) is a kind of light and small handling equipment, which has two fork like legs. It can be inserted into the free fork hole of the tray. There are two small diameter walking wheels at the front end of the leg, which can support the weight of the pallet cargo and can be lifted to make the pallet or cargo box leave the ground, and then used for pulling or electric driving to make it walk. This kind of pallet carrier is widely used for loading and unloading at the receiving and dispatching platform or handling operations without stacking between processes in the workshop.