In　the　light　of　low　efficiency　of　photovoltaic　power　generation　and　the　problems　of　air　source　heat　pump＇s　application　in　the　cold　regions,　this　paper　developed　a　composite　evaporator　and　designed　a　new　type　of　solar-air　composite　heat　pump　system,　which　was　comprised　of　independently　developed　solar　photovoltaic-thermal　collector　based　on　flat　plate　micro　heat　pipe　and　air　source　heat　pump.　The　performances　of　heat　pump　system　were　studied　experimentally,　including　water　temperature　of　the　heating　tank,　suction　and　discharge　pressure,　and　performance　of　heat　pump.　When　73L　water　in　the　heating　tank　was　heated　by　1　HP　heat　pump　from　15　degrees　C　to　50　degrees　C　at　the　ambient　temperature　of　5　degrees　C,　the　running　time　of　dual　heat　source　operation　conditions　was　5.14%　shorter　than　that　of　separate　air　heat　source　operation　conditions.　Meanwhile,　COP　increased　by　5.99%.