本文推导了土粒在倾斜球面圆盘上运动的轨迹、速度和加速度方程并给出了相应的计算机绘图。计算了圆盘工作时的临界偏角、土壤与圆盘工作面的界面曲线和盘背挤土面积,并给出了界面曲线及挤土面积与偏角关系的计算机图形表示。本文的研究结果可作为圆盘犁、垂直圆盘犁和圆盘耙设计的理论依据。 In this paper, the trajectories, velocities and accelerations of soil particles on a tilted spherical disk are deduced and the corresponding computer graphics are given. The critical angle of deflection, the curve of the interface between the soil and the disk and the area of ​​the back of the disk were calculated. The computer graphics of the relationship between the curve of the interface and the area of ​​the squeezed soil were given. The results of this paper can be used as the theoretical basis for the design of disc plow, vertical disc plow and disc harrow.