The invention belongs to the technical field of leveling machines, and particularly relates to a metal plate leveling machine. The metal plate leveling machine comprises a rack, a fixed roller, a working roller and a controller, wherein the two ends of the fixed roller and the two ends of the working roller are rotatably arranged on the rack, and the working roller is arranged above the fixed roller; and a first cavity is arranged in the working roller, a set of first holes are uniformly arranged in the working roller at equal intervals, the set of first holes are communicated with the first cavity, and an anti-rebound mechanism is arranged in the first cavity and comprises a motor, a first shaft, a cam and an anti-rebound protruding block. Through the arrangement of the anti-rebound mechanism, anti-rebound treatment is carried out in real time in the metal plate leveling process, rebounding possibly occurring after metal plate leveling is eliminated, meanwhile, the stress balance state of materials in the metal plate is changed through the anti-rebound mechanism, rebounding is eliminated, and the metal plate leveling quality is further improved.