Steel plate groove edge milling machine

The invention relates to the technical field of groove edge milling equipment, and provides a steel plate groove edge milling machine which comprises a machine frame, a conveying belt and edge milling mechanisms, the conveying belt and the edge milling mechanisms are arranged on the machine frame, an edge changing mechanism is additionally arranged, the number of the edge milling mechanisms is two, and the two edge milling mechanisms are located on the two sides of the edge changing mechanism respectively in the conveying direction; the two clamping plates are arranged on the rack in a swinging mode, the swinging axes of the clamping plates are perpendicular to the conveying direction, the two clamping plates are buckled after swinging to form a containing space, the containing space is used for containing a steel plate, an included angle is formed between the center line of the two clamping plates after buckling and the horizontal line, the hinged ends of the clamping plates are provided with a plurality of