In this research, we have established a kinematics model of rotary-cultivating cutters of no-tillage seeding machine, and studied the dynamics feathers of soil movement in the tangent face of the furrow-digging cutters. Through the optimization simulation test of rotary-cultivating furrow-digging machine by means of Matlab and the field soil-throwing test, we have found that the soil-throwing performance is the best when bending radius of the cutters is within 0.21–0.23 m, the rotating velocity of the cutter head is 245 r/min, and when the relative velocity of soil particle leaving tangent face is within 4.5–6 m/s after 0.04 s is also confirmed by test in paddy filed and the maximum soil-throwing distance is 0.968–1.024 m.