The present application provides a lathe fixture for clamping an automobile hub, including a first base, a deflection block support block, a deflection block, a deflection block guide shaft, a circular plate and the like, a second base is connected with the first base via a group of eighth screws and a second pin, the circular plate is connected with the first base via a group of sixth screws, a power chuck is connected to the second base via a group of third screws, and an O-shaped rubber ring is placed between a power chuck and a groove of the second base. Compared with the conventional automobile hub lathe fixture, the lathe fixture has a large relaxing/clamping travel and may adapt to the machining of hubs of multiple sizes.