Iron core cake of iron core reactor

The utility model discloses an iron core cake of an iron core reactor, which relates to the technical field of reactors and comprises a plurality of iron core sheet groups which are arranged in a laminated manner, each iron core sheet group comprises a plurality of iron core sheets which are arranged in a laminated manner, the lengths of the iron core sheets are equal, and the symmetrical center lines of the iron core sheets in the length direction are positioned in the same plane. The symmetrical center lines of the iron core pieces in the width direction are located in the same plane, welding grooves which are opened outwards are formed in the outer edges of the two ends of each iron core piece in the length direction respectively, the welding grooves in the same end are aligned with one another and are welded with continuous welding seams, and the iron core pieces are fixedly connected through the continuous welding seams. At least two riveting parts are arranged on each iron core piece in the length direc