The present invention relates to a mounting plate for a lock and a
electromagnetic lock therewith, wherein a top of a lock body (e.g., a electromagnetic body) of a lock is fixed on a door frame via a mounting plate, the mounting plate comprising a plurality of mounting apertures placed at both ends thereof, and a plurality of mounting holes which an elliptical shape being spaced apart by a predetermined distance, and being provided in a portion between the mounting apertures, and each of the mounting apertures comprising an inner
flange formed along an edge thereof wherein the
flange of one of the mounting holes is placed opposite the
flange of any adjacent one of the mounting holes. In installation, edge of head of each mounting screw on top of lock body is adapted to obliquely insert into the mounting holes and then slide
clockwise to rest on the flange. Finally, a plurality of screws are driven through the mounting plate for securing the mounting plate onto the electromagnetic body.