Drilling clamp

The utility model discloses a drilling clamp. The clamp is used for clamping and positioning in the drilling process of the L-shaped chain hanging plate. The device comprises a first positioning platewhich is horizontally arranged, second positioning plates which are vertically intersected are arranged at the edge of the first positioning plate; the first positioning plate is provided with a rotating pin and a support which are arranged left and right at an interval; the rotating pin and the support are both perpendicular to the first positioning plate, a first pressing plate is arranged above the rotating pin and the support, the right end of the first pressing plate is hinged to the support, the left end of the first pressing plate is detachably connected with the rotating pin through afirst locking nut, and a guide sleeve perpendicular to the first positioning plate is arranged on the first pressing plate; a traction rod perpendicular to the second positioning plate is arranged onthe second positioning pla