The　active　solar　house-heating　in　winter　is　a　novel　technology　that　is　eco-friendly　and　economical.　The　performance　of　a　small　solar　heating　system　composed　of　parabolic　trough　collector　(PTC)　and　ventilation　pipelines　has　been　experimentally　investigated　in　the　current　study.　With　an　automatic　solar-tracking　device,　the　system　adopted　a　PTC　device　of　aperture　area　2.407　m(2).　The　air　stream　was　heated　in　the　tube　collector　and　then　driven　into　the　test　room.　By　examining　the　heat　gain　of　the　air　stream　passing　through　the　PTC　as　well　as　the　temperature　distribution　of　the　indoor　air,　the　working　characteristic　of　the　solar-heating　system　in　winter　was　evaluated　practically.　The　experimental　results　showed　that　for　the　generally-insulated　room　that　was　located　in　39.87　degrees　N　latitude,　the　daily　solar　heating　time　reached　to　6-7　h,　and　the　thermal　efficiency　of　the　PTC　device　was　above　60%.　Supposing　the　heat　loss　is　reduced　effectively　along　the　outdoor　pipelines　in　the　future,　such　active　solar　heating　system　will　be　a　promising　heating　technology　in　regions　that　are　not　far　north　on　the　earth.