The utility model discloses a novel insulating anti -corrosion sleeve of electric power multiplexer utensil, including outer ring body and interior ring body, interior ring body zhou junbu has tooth of slope, outer ring body upside and downside all are equipped with annular cover plate, in the recess of inner ring position between annular cover plate, it compresses tightly stop gear to be equipped with a plurality of that is used for compressing tightly interior ring body on the outer ring body, compress tightly stop gear including setting up the screw on outer ring body and lieing in the bolt of screw, be equipped with the recess in the bolt, be equipped with the spring in the recess, be equipped with the compact heap on the spring, the compact heap be with tooth assorted tooth piece, the internal a plurality of elastic rubber sheet that is equipped with of inner ring, the elastic rubber sheet upper end is equipped with the fastener of falling the U -shaped, the utility model discloses convenient to use, save operating time, categorised comprehensive, the range of application is wide.