Right-angle clamp for cutting calibration of laser cutting machine

The utility model relates to the field of laser cutting, in particular to a right-angle clamp for cutting calibration of a laser cutting machine. The right-angle clamp comprises a first stop piece and a second stop piece, the first stop piece and the second stop piece are rectangular, the first stop piece and the second stop piece are mutually perpendicularly connected to form a right-angle area, the right-angle clamp is fastened on a laser cutting machine cutting working table through a screw, the foot of perpendicular of the right-angle area is coincided with the cutting original point of the laser cutting machine, the first stop piece and the second stop piece are respectively parallel to edges of the laser cutting machine cutting working table, accordingly, each time the material feeding is performed, one angles of plates are merely required to be placed in the right-angle area, then the plates are respectively abutted to the first stop piece and the second stop piece of the clamp, the further calibration