本文从理论上阐述收割机齿纹动刀片的切割机理。分析了齿纹刀片的磨损规律、组成刀片齿纹诸多空间角度参数的作用及其对“自磨锐”性能的影响。通过对齿纹刀片的外形、结构和参数的合理设计,使刀片在切割茎秆的磨损过程中得到自身的刃磨,获得优良的“自磨锐”和“长齿”性能,从而发挥刀片金属材料的充分利用率,达到延长刀片使用寿命的目的。 This paper elaborates the cutting mechanism of harvester tooth pattern moving blade theoretically. The wear regularity of the tooth profiled blades, the role of many spatial angle parameters of the tooth profile of the blade, and the influence on the self-sharpening performance were analyzed. Through the rational design of the profile, structure and parameters of the serrated blade, the blade obtains its own sharpening during the cutting process of the stalk and obtains the excellent self-sharpening and long-toothed performance so as to play the role of the blade metal The full utilization of materials to achieve the purpose of extending blade life.