The invention provides an absorption type grading heat supply system, belonging to the technical field of waste heat utilization and heat pump / refrigeration. A first generator, a first absorber, a first condenser, a first evaporator, a first solution pump, a first throttle valve, a first solution heat exchanger, a newly-added generator, a newly-added absorber, a newly-added solution pump and a newly-added solution heat exchanger form a primary heat medium heating process; a second generator, a third generator, a second absorber, a third absorber, a second condenser, a second evaporator, a second solution pump, a third solution pump, a second throttling valve, a second solution heat exchanger and a third solution heat exchanger form a secondary heat medium heating process; and a primary heat medium flows through the secondary heat medium heating process and provides a drive heat load and a low-temperature heat load, and a circulating pump realizes primary heat medium circulating flowing. Corresponding parts are additionally provided, thus a series of absorption type grading heat supply systems are obtained.