Square plate part drilling clamp

The utility model relates to the field of drilling machining, and discloses a square plate part drilling machining clamp which comprises a bottom plate, two sliding grooves are formed in the top of the bottom plate and located in the front side and the rear side of the top of the bottom plate, a first limiting plate is slidably connected between the tops of the two sliding grooves, and the sliding grooves are in sliding fit with the first limiting plate; the first limiting plate is located on the left side of the top of the bottom plate and abuts against the top of the bottom plate, the top of the first limiting plate is in threaded connection with two first bolts, the two first bolts are located on the front side and the rear side of the top of the first limiting plate, and the bottom ends of the first bolts extend into the sliding grooves and are in sliding clamping connection with the inner bottom walls of the sliding grooves. The top of the first bolt is in threaded connection with the nut; a second limit