The invention provides a fourth type absorption heat pump, and belongs to the technical field of absorption heat pumps and afterheat utilization. The fourth type absorption heat pump mainly consists of a generator, a second generator, a third generator, a fourth generator, a condenser, an evaporator, an absorber, a second absorber, a solution pump, a second solution pump, a third solution pump, a throttle valve, a second throttle valve, a solution heat exchanger, a second solution heat exchanger, a third solution heat exchanger, a fourth solution heat exchanger and a heat exchanger; the generator and the second generator finish the driving of heat utilization of a heat medium; the third generator and the fourth generator finish the heat utilization of a refrigerant; the evaporator obtains afterheat; the absorber and the condenser supply heat to the external; and thus, the fourth type absorption heat pump is formed.