The utility model discloses a leg is restrainted in mountain -climbing, the insulating circuit protective sleeve comprises a sleeve body, cover body upper portion, lower part are equipped with the trepanning that has guide rope respectively, the cover body is equipped with set perpendicular zip fastener of body split, the external side of cover is equipped with the pocket. The pocket is made by sealing material, pocket upper portion is equipped with the zip fastener. The internal side of cover is equipped with the cushion. The pocket pastes through the magic of locating the external side of cover and adheres in set body. The utility model discloses the leg is equipped with perpendicular zip fastener and the trepanning that has guide rope makes things convenient for people's halved tie leg to fix restrainting, is equipped with detachable and by the pocket that sealing material made, is convenient for prevent some medicines that prevent invasion and attack such as snake, worm, mouse, ant before the mountain -climbing on restrainting the leg, uses the magic subsides to be convenient for people and dismantles the washing to the pocket after using.