The invention provides a cooling manipulator of a die-casting machine for an automobile aluminum alloy hub. The cooling manipulator comprises two supporting seats, a bracket, a transverse driving mechanism, a mechanical grabber, a longitudinal driving mechanism, a cooling water tank and a discharging rack, wherein the two supporting seats are arranged in parallel, and the bracket is mounted on the two parallel supporting seats; the transverse driving mechanism is mounted on the bracket; the mechanical grabber, comprising a moving rack, a first cylinder and a grabber body, is mounted on the transverse driving mechanism and is driven by the transverse driving mechanism to horizontally move; the longitudinal driving mechanism is mounted below the transverse driving mechanism; the cooling water tank is mounted in front of the longitudinal driving mechanism; the discharging rack is mounted at the front side of the cooling water tank. The cooling manipulator of the die-casting machine for the automobile aluminum alloy hub is simple in structure, high in automation degree, and free of manual carrying of the hub casting; the automobile aluminum alloy hub can be automatically clamped, moved, cooled, turned over and discharged in production, so that the automation level of a hub production device can be improved.