The invention discloses a high-altitude crossover releasing device for a lifting type heavy power cable. The device comprises a turning pulley which is connected to power towers, and a plurality of overhead wire arrangement mechanisms which are connected to a bearing cable between the power towers; each overhead wire arrangement mechanism comprises at least four lifting wheel sets; one lifting wheel set is connected to the bearing cable to be used as a travelling part, and the rest lifting wheel sets are respectively connected to the travelling part through length-increasing lifting ropes; each lifting wheel set comprises two wire arrangement wheels which are respectively mounted in door frame shaped brackets; the bracket opening ends of the two wire arrangement wheels are opposite to each other, and one of the sides is in rotating connection and while the other one of the sides is connected by positioning through an inserting pin. According to the device, the turning pulley and the overhead wire arrangement mechanisms form a plurality of air corridors with different height and meeting the requirement on quantity of leads of heavy power cables, and therefore, the heavy tension mechanisms, crossing frames and safety protection nets can be saved, and as a result, the construction process and cost can be greatly reduced.