The utility model provides a solar photovoltaic waste heat recovery device that generates electricity, it includes photovoltaic cell board (1) characterized by, box -shaped heat collector (3), insulating layer (4), installation bedplate (5), photovoltaic terminal box (6), photovoltaic controller (7), battery (8), one way check valve (9), microprocessor (11), heat exchanger (10) and backflow pipeline (12), the back in photovoltaic cell board (1) is pasted through series thermal silica (2) in box -shaped heat collector (3), but be full of flowing liquid heat -conducting medium in the box -shaped heat collector and be used for heating cold water, rethread backflow pipeline (12) are got back to in box -shaped heat collector (3) again, one way check valve (9) is connected with photovoltaic terminal box (6) electricity by microprocessor (11) control, photovoltaic controller (7), be connected with battery (8) is electric again, battery (8) rethread photovoltaic controller (7) are one way check valve (9) and microprocessor (11) and supply power. The utility model discloses simple structure, energy utilization are rateed highly, difficult freezing.