The utility model discloses a blanking limiting device for a cutting machine, which is characterized by comprising a material receiving table and a limiting mechanism arranged on the top surface of the material receiving table, the limiting mechanism comprises an L-shaped plate, a baffle plate, a fixed block and an adjusting rod, and the L-shaped plate comprises a transverse plate and a vertical plate which are connected end to end; the baffle plate is arranged above the vertical plate; the bottom face of the baffle abuts against the top face of the vertical plate. The right side of the bottomof the baffle is rotationally connected with the right side of the top of the vertical plate through a hinge. A U-shaped plate is arranged above the right side of the vertical plate; an opening of the U-shaped plate faces the vertical plate, a connecting bolt is arranged below the U-shaped plate, a spring is inserted into the opening of the U-shaped plate, the bottom of the spring is connected with the connecting bolt, the top of the spring is arranged above the vertical plate, and the right side face of the baffle abuts against the outer edge face of the spring. According to the utility model, the limiting quality is improved, and the labor intensity of operators is reduced.