The utility model discloses an electrified first specialized tool of suspension insulator dismouting bowl that changes of earth potential, in being equipped with the axial cavity the mobile jib and at the push rod of mobile jib axial cavity intracavity endwise slip, the nested sliding sleeve that has the endwise slip of drive push rod of outside slip of mobile jib, the bottom of mobile jib is equipped with the location hook that is used for fixing and mentioning suspension insulator bowl head, the bottom of push rod is equipped with the slide wedge, the slide wedge relies on the scarf to back down the suspension insulator and throw off with bowl head couple when the push rod lapse, it makes the push rod realize the reset spring who resets to be equipped with between the bottom of push rod and the mobile jib bottom. The utility model discloses can more save time, laborsaving mode dismouting bowl head to shorten that the earth potential is electrified changes the suspension insulator activity duration, make live working efficiency and safety more.