The Z1-20t heavy-duty AGV can provide a load capacity of 20t per vehicle, and has the functions of turning in place and lateral movement. It is particularly suitable for the transportation of large-sized and large-tonnage workpieces. It can run on asphalt, self-leveling, and concrete floors, and has strong adaptability to ground conditions. Because it has the function of self-lifting of the entire vehicle, in addition to being used to directly carry workpieces, it can also be used to indirectly carry workpieces by drilling into the workpiece rack and self-lifting, and then lifting the workpiece rack. According to user requirements, multiple AGVs can be synchronized and used to lift super-large components. It uses the composite navigation mode of PGV+ QR code for fully automatic operation, and can also be operated remotely.