The invention provides a solar-heat pump combined food air thawing system and a solar-heat pump combined food air thawing method and belongs to the technical field of food air thawing. The system comprises an air circulation subsystem, a solar hot water circulation heat exchange subsystem and a refrigerating medium circulating subsystem. The air circulation subsystem comprises a food thawing chamber (1), a fan (12), an air electric heater (11), an air volume regulating valve (10), an atmospheric condenser (6), an air volume regulating valve (16) and an evaporator (14); the solar hot water circulation heat exchange subsystem comprises a solar heat collector (2), a water flow regulating valve (3), a water-water heat exchanger (13) and a water supply pump (14); and the refrigerating medium circulating subsystem comprises a refrigerating fluid container (8), the atmospheric condenser (6), a refrigerating expansion valve (5), the evaporator (4) and a refrigerating compressor (7). The system has the advantages of quick thawing, high thawing quality, simple process, obvious energy conservation and the like.