Chain tooth type cutter used for corn stubble harvesting

The invention discloses a chain tooth type cutter used for corn stubble harvesting and aims at solving the problems that existing stubble cutting tools are complicated in structure, difficult to replace and high in resistance and energy consumption. The cutter includes a driving chain wheel, a driven chain wheel, a chain, toothed blades, a guide plate and a cover plate. The driving chain wheel andthe driven chain wheel are same in specification, the root circle radius R1 is equal to R2, the tooth height n is equal to or greater than 0.4R1 and equal to or smaller than 0.2R1, the guide plate achieves a guiding support effect, the thickness of the guide plate does not exceed 5 mm, and rectangular grooves and limiting mounting holes are formed in the surface of the guide plate; the cover plate is divided into an upper layer and a lower layer and achieves a sealing protection effect on the transmission chain, each chain link is provided with the corresponding toothed blade, the length h ofeach blade is 80 mm, the