The utility model belongs to the technical field of flange face anticorrosion coating is destroyed the repair, concretely relates to specialized tool is repaired to flange face coating, the purpose adopts professional instrument to solve in a large amount of problems damaged or unable location benchmark face when newly doing the coating of flange face, provides a specialized tool is repaired to flange face coating, uses the ready -made anticorrosion coating of this instrument not influence flange sealing surface's sealing performance. Its characterized in that: it is including positive silk screw rod, anti - silk screw rod, adjusting nut, fixed plate, body and base, the upper and lower two halves part of body is connected through the fixed plate, positive silk screw rod, anti - silk screwrod, adjusting nut and base are located the inside of body, the base welding is on the inner wall of body, the base respectively with the outside end screw thread connection of positive silk screw rodwith the silk screw rod of turning over, adjusting nut respectively with the inboard end screw thread connection of positive silk screw rod with the silk screw rod of turning over.