The invention discloses a solar photovoltaic photo-thermal heat collector with a porous foam metal heat-exchange structure. The solar photovoltaic photo-thermal heat collector adopts a structure of up-down double cooling channels, combines with a porous foam metal layer (6) for heat-exchange enhancement, the temperature of solar photovoltaic elements is reduced, the power generation efficiency ofthe solar photovoltaic elements is improved, at the same time, a large amount of heat generated by the solar photovoltaic elements is timely transmitted to cooling gas, and the cooling gas is discharged from a heat collector air outlet (11) to be used for preheating, drying, indoor heating and the like. According to the solar photovoltaic photo-thermal heat collector with the porous foam metal heat-exchange structure, the applied foam metal has a high thermal conductivity and a high specific surface area, the cooling efficiency of traditional solar photovoltaic photo-thermal heat collectors can be effectively improved, and the down-inflow and up-outflow modes are adopted, so that the heat-exchange process is close to the counter-current heat exchange and the heat-exchange efficiency achieves the highest.