The utility model relates to a climb rope ladder and prevent high altitude combination safety protection instrument that falls belongs to overhead transmission line technical field. Technical scheme is: contain anti -drop circulation transmission coaster, take self -lock device's rope ladder head and climb rope ladder person safety hook, runing rest (13) in the anti -drop circulation transmission coaster are fixed in pulley frame (9) bottom, and pulley frame (9) side is equipped with the spout of sealing up a door (18), seal up a door one (5) to establish in the spout of sealing up a door (18), taking back main support (28) and back assistant support (101) lower extreme in self -lock device's the rope ladder head to constitute and sealing up a door two, it is equipped with auto -lock hyoplastron (26) in two to seal up a door, and auto -lock hyoplastron (26) are connected with back main support (28) rotation, the bottom of climbing main link plate (45) in the rope ladder person safety hook is the cell type structure of outside salient, and establish at the inslot cardboard (50). The beneficial effects of the utility model are that: application method is simple, and safe and reliable guarantees operation personnel's personal safety.