The utility model relates to a special insulator PRTV spraying device of electric power system, including the watering can, the insulator spindle that have the nozzle, act as go -between, handle and spanner, the watering can is connected with the one end of the insulator spindle of hollow tube column structure, the other end of insulator spindle is provided with the handle of strap wrenches, actsas go -between to lie in the cavity of insulator spindle, its one end is connected with the pressure device of watering can, the other end through twine pin after the connection on the spanner. The utility model has the advantages of through extended whole spraying device's length of insulator spindle, operating personnel can stand and accomplish the PRTV spraying work to the eminence insulator onground, and operator person need not high altitude construction again, has stopped the potential safety hazard.