Shuttle rack is a semi-automatic storage system composed of forklifts, shelves, and shuttle cars. This system is derived from the drive-in shelf and is a high-density storage system that can efficiently utilize warehouse space. Shuttle rack is a system where goods are transported by forklifts to the working passage, and then driven in and out by the shuttle truck to achieve the function of cargo storage and retrieval. After the goods are delivered to the passage, the forklift can leave for the next operation, thereby improving the efficiency of the operation.