Flange plate drilling clamp

The utility model discloses a drilling clamp for a flange plate. The drilling clamp comprises a positioning screw, a supporting nail, a positioning seat, a stop pin, a drill plate, a locking nut and a drill bushing, a through hole is formed in the center of the positioning seat, and a supporting nail is arranged on the upper surface of the positioning seat and used for supporting a flange part; a through hole is formed in the center of the drill plate, the drill plate is arranged on a boss of the flange part in a sleeving mode, a platform parallel to the flange part is arranged at the bottom of the drill plate, a drill bushing hole is formed in the platform, and a drill bushing is arranged in the drill bushing hole. A stop pin is arranged on the outer side of the drill plate for side face positioning. And a positioning screw penetrates through the through holes of the positioning seat, the flange part and the drill plate and is connected with a locking nut for fixing. The clamp is used for solving the problem