Lightweight automobile aluminum alloy hollow control arm

The utility model provides a light-weight automobile aluminum alloy hollow control arm which comprises a control arm body, an upper lining hole is fixedly connected to the upper end of one side of the control arm body, a lower lining hole is fixedly connected to the position, below the upper lining hole, of the control arm body, a right lining hole is fixedly connected to the position, on one side of the lower lining hole, of the control arm body, and an upper lining hole is fixedly connected to the right lining hole. The axis of the lower lining hole and the axis of the right lining hole coincide and are parallel to the axis of the upper lining hole, and the portion, between the lower lining hole and the right lining hole, of the control arm body is in an arc shape. The plate is welded on the control arm body through friction stir welding, so that the cavity is formed in the control arm body, the energy loss during vehicle running is reduced, the carbon dioxide emission during product manufacturing is reduce