The invention discloses a nut drilling clamp which comprises a supporting plate, positioning sleeves, a drilling template and a connecting rod, wherein the positioning sleevesare detachably connected with the supporting plate; the connecting rod penetrates through the supporting plate and the positioning sleeves; stepped holes are formed in the middle of the supporting plate and are a first round hole, a second round hole and a third round hole in sequence from top to bottom; the diameter of the first round hole is greater than that of the second round hole; the diameter of the second round hole is greater than that of the third round hole; the depth of the first round hole is the same as that of the second round hole; the positioning sleeves are a first sleeve and a second sleeve from top to bottom; positioning through holes with the same diameters as the third round hole are formed in the positioning sleeves; the connecting rod is sleeved by a first locking nut; a threaded column is sleeved by a second locking nut. According to the nut drilling clamp, the deficiencies of low processing efficiency, serious abrasion of a drill bit and a drill bushing and high labor intensity of operators for a drilling clamp in the prior art are overcome.