To　address　the　issues　about　the　detailed　and　humanization　alignment　design　of　curve　in　rail　transit,　this　paper　quantitatively　analyzes　the　indexes　of　pedestrian　self-adaptation　characteristics　and　the　computation　theory,　collects　empirical　data　through　controlled　pedestrian　experiment,　and　validates　the　empirical　data　with　fundamental　diagram　theory.　Based　on　this,　the　pedestrian　self-adaptation　characteristics　research　in　curve　is　performed,　and　the　impacts　of　curve　design　on　pedestrian　self-adaptation　characteristics　are　analyzed.　The　results　reveal　that:　the　stability　and　safety　of　pedestrian　self-adaptation　characteristics　would　be　improved　with　the　increasing　of　curve　angle;　the　critical　point　of　curve　radius　is　7　m,　i.e.,　the　stability　of　pedestrian　self-adaptation　characteristics　will　be　improved　until　the　curve　radius　increase　to　7　m,　while　declined　since　the　radius　continuously　ascended;　the　performance　and　efficiency　of　pedestrian　selfadaptation　characteristics　is　the　best　with　angle　in　[120°,　160°]　or　radius　in　[4,　10]m,　worse　with　angle　in　[100°,　110°]　and　equal　to　170°　or　radius　in　[11,　15]m,　while　the　worst　stability　and　safety　with　90°-angle　or　1　m-radius.　Thus,　the　angle　of　curve　in　the　[120°,　160°]　and　radius　in　[4,　10]m　are　recommended　when　the　passenger　flows　are　large.　Copyright　©　2017　by　Science　Press.