In　this　study,　the　main　design　parameters　of　the　heat　pump-beat　pipe　composite　system　were　calculated.　The　operation　characteristics　of　the　heat　pump/heat　pipe　composite　system　under　low　temperature　were　experimentally　studied　The　start-up　character　of　the　heat　pipe　radiator　and　heat　pipe　radiator　surface　temperature　distribution　were　obtained.　The　variation　of　heating　capacity　and　heating　coefficient　of　performance　of　the　heat　pump　heat　pipe　composite　system　with　different　working　condition　was　obtained.　Experimental　results　show　that　the　heat　pump＇　heat　pipe　composite　system　can　operate　efficiently　and　steadily　when　the　outdoor　temperature　is　-20　similar　to　5　degrees　C,　and　meet　the　winter　heating　demand　in　cold　areas.