The invention discloses heat pump air conditioning equipment which comprises a compressing mechanism, a first four-way valve, a second four-way valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first throttling mechanism, a second throttling mechanism, a third throttling mechanism, a first one-way valve, a second one-way valve and a flow direction control valve; a high-pressure node of the first four-way valve is connected with a high-pressure node of the second four-way valve through a fifty-ninth pipeline; a low-pressure node of the first four-way valve is connected with the low-pressure node of the second four-way valve through a seventy-fifth pipeline, a sixth-fifth pipeline, an eighty-fifth pipeline in sequence; the outlet end of the compressing mechanism is connected with the fifty-ninth pipeline though a sixtieth pipeline; and the inlet end of the compressing mechanism is connected with any one of a sixty-third pipeline, a seventy-fifth pipeline, a sixty-fifth pipeline or an eighty-fifth pipeline. The heat pump air conditioning equipment is simple in structure, is reliable in work, is low in cost, and can realize a refrigerating function, a heating, and a heating-defrosting function.