Air　source　heat　pump　is　a　kind　of　circulatory　system　that　utilizes　the　low　energy　in　the　environment,　high　efficiency,　environmental　protection,　energy　saving　and　convenient　operation,　however,　the　system　is　greatly　affected　by　the　climate　and　environment.　The　article　mainly　analyzes　the　technology　and　development　status　of　various　air　source　heat　pump　systems　in　building　heating　in　cold　regions,　and　provides　reference　for　further　optimization　of　the　system.　©　2019　International　Institute　of　Refrigeration.　All　rights　reserved.