110kV and following isolator post insulators change appurtenance, including base, davit, pole setting and rope, bottom and the base of pole setting link to each other, the top of pole setting links to each other with the davit, be equipped with the locating pin in the pole setting of davit lower part, the both ends of davit all are equipped with the fixed pulley, and one of them fixed pulley passes through the rope and links to each other with the movable pulley lifting hook, and the one end of rope is walked around two fixed pulleys and a movable pulley and is fixed on the U type ring of davit upper end, and the other end of rope is by manual control. The utility model discloses an advantage effect as follows: small, light in weight, conveniently carry, the suitability is strong, and is applicable in the on -the -spot and all kinds of power failure modes of compact, can firmly be fixed in on optional size's the switch framework, rotatable davit combination locating pin, it is more reasonable to make the hoisting point select, use the assembly pulley, actual pulling force theoretical value is only for to be hung 14 of thing weight, and manpower stay cord station position is more random, easy and simple to handle, it can use to need not the training.