Solar　energy　offers　a　clean,　renewable　and　domestic　energy　source.　It　will　be　conducive　to　the　energy　conservation　of　heating　system　if　solar　energy　can　be　used　into　winter　heating　fresh　air　system　to　reduce　winter　heating　load.　In　this　paper,　the　experiments　of　winter　heating　fresh　air　system　based　on　an　evacuated　tube　solar　collector　were　investigated.　Solar　energy　collected　during　sunshine　hours　was　utilized　for　winter　heating　fresh　air　system　at　night.　Furthermore,　the　experimental　data　of　continuous　operated　on　sunny　days　have　been　collected.　The　investigation　shows　that　such　a　solar　energy　winter　heating　fresh　air　system　is　very　attractive　and　can　be　used　as　a　supplement　to　reduce　heating　energy　consumption.