The utility model belongs to the technical field of overhead transmission line installs the maintenance and specifically relates to a 66kV insulator discharge gap that can install with electricity isrelated to, including link fitting and electrode, electrode package draws together conducting rod and discharge end, its characterized in that, be equipped with insulating sheath on the conducting rod, the last fixed clamping opening that is equipped with of insulating sheath. Compared with the prior art, the beneficial effects of the utility model are that: 1 ) the device simple structure, application scope is wide, can satisfy 66kV tangent tower suspension insulator (cluster) with parallelly connected clearance and the relevant technical standard requirement of dead end insulator (cluster) with parallelly connected clearance, 2 )Can cooperate insulating bar to realize electrified installation and maintenance and change, the device alone can be operated, and the operation need not have apower failure, 3 )The high -pressure side and the ground side firm in connection of link fitting and insulator, electric excellent performance satisfies lightning flashover route weak point, shifts and dredges the requirement that power frequency arc is rapid.