在保护性耕作环境下，为了研究普通圆盘刀、大波纹圆盘刀、缺口圆盘刀等不同类型被动式圆盘刀的作业性能，设计了一种偏角和倾角可调的圆盘刀试验台，并以圆盘刀类型、前进速度、偏角、倾角为因素，圆盘刀破茬率和工作阻力为评价指标，进行了四因素三水平正交试验。结果表明：各因素对破茬率和工作阻力影响的主次顺序依次为：圆盘刀类型、倾角、前进速度、偏角；被动式圆盘刀在给定因素水平上的最优组合是：选用大波纹型圆盘刀，前进速度为5km/h，偏角为5°，倾角为2°，破茬率为86.17%，工作阻力为3296.53N；在低速情况下，圆盘刀滑切破茬效果好于砍切。本研究可为以圆盘刀破茬的深松作业机等农机产品提供设计依据。

Under the environment of protection ploughing, this research designed a kind of test bench on which the sweep and tilt angles of disc coulter can be adjusted precisely in order to study the working performance of different kinds of passive disc coulter: general disc coulter, big ripple disc coulter, notched disc coulter, etc. Simultaneously, this research did four factors and three levels of orthogonal tests by using the factors of the type, velocity, sweep angle, and tilt angle of disc coulter and the evaluation indices of cutting rate and traction resistance. The optimal combination of parameters was achieved through orthogonal tests. Besides, the optimal combination of parameters was repeated verification tests. Fewer factors and levels were studied in this test. And it would take a longer time to do the test if we did a comprehensive test. Therefore, it was a reasonable choice of the orthogonal test. The principle of orthogonal tests was the use of scientific methods to s