The utility model discloses a two host computer heat source tower heat pump system with solution regenerative function, including heat source tower heating system and solution regeneration system. Heat source tower heating system comprises a heat pump set, heat source tower, solution pump and solenoid valve, the concentrated system of solution comprises the 2nd heat pump set, sleeve heat exchanger, the concentrated bucket of solution, first solution pump, second solution pump and solenoid valve. The dense shrinkage flowing journey of solution does: at first by the microthermal concentrated solution of the 2nd heat pump set preparation, the heat transfer is carried out through plate heat exchanger to the weak solution of microthermal concentrated solution and heat pump set evaporimeter export, and messenger's weak solution produces certain super -cooled rate. Later sending the concentrated bucket of solution to and relieving the subcooling, partial water becomes ice appears, and solution becomes the concentrated solution by the weak solution, accomplishes the solution concentration process. The utility model discloses a two host computer heat pump system, a heat pump set is the large -capacity machine units, is responsible for the heat supply specially, the 2nd heat pump set is the low capacity unit, and special concentrated solution has the heat supply function concurrently.