The invention relates to a first-type lithium bromide heat pump unit provided with a peak-load calorifier and capable of realizing direct heating, and belongs to the technical field of air conditioning equipment. The first-type lithium bromide heat pump comprises a condenser (1), a generator (2), a heat exchanger (3), an absorber (4), a solution pump (5), a coolant pump (6), an evaporator (7), thepeak-load calorifier (8), a hot water regulating valve (9) and a coolant regulating valve (10), wherein the hot water regulating valve regulates the amount of hot water entering the peak-load calorifier, and high-temperature coolant steam in the generator enters the condenser and the peak-load calorifier in parallel; after the coolant regulating valve is opened, direct heating can be realized when waste-heat water is absent. According to the unit, the heat pump and a peak load shaving boiler are integrated, the direct heating can be realized, the machine room area can be saved, besides, heatof waste-heat water can be recovered preferably as far as possible, and energy is saved.