In order to explore the influence of the side-direction straw-cleaning blade for seedbed treatment of original stubble planter on straw winding, vibration intensity, power consumption and straw mulching uniformity during machine operation, the structure and working principle of side-direction straw-cleaning device was introduced, the structure of side-direction straw-cleaning blade and the working curve of slippery cutting surface was designed, and the key structure and working parameters affecting the working performance of the blade were determined. By using four factors and three levels orthogonal test method, the initial radius ρ0, initial slip angle τ0, blade carrying shaft angular velocity ω and tool operating speed vm were selected as the influencing factors, and the straw winding, vibration intensity, equivalent power consumption and straw mulching uniformity were taken as the evaluation indexes. The optimal analysis of the structure and working parameters combination of the blade affecting the tool operating performance was carried out. For straw winding, the order of primary and secondary effects was as follows: initial slip angle, initial radius, tool operating speed and blade carrying shaft angular velocity;for vibration intensity, the order of primary and secondary effects was as follows: tool operating speed, initial slip angle, blade carrying shaft angular velocity and initial radius;for equivalent power consumption, the order of primary and secondary effects was as follows: tool operating speed, initial slip angle, blade carrying shaft angular velocity and initial radius. Under the conditions with the initial radius of 200mm, the initial slip angle of 30°, blade carrying shaft angular velocity of 42rad/s and tool operating speed of 7.2km/h, there was no straw winding, vibration intensity was 159m/s2, equivalent power consumption was 4.9kW, and straw mulching uniformity was 0.075. Compared with the existing combination of cutters and teeth, the vibration intensity was decreased by 46.5%, equivalent power consumption was decreased by 29.7%, and there was no tool blockage in the working process. The research results can provide theoretical and experimental data support for the design of key components of lateral straw cleaning device of 2BMFJ series no-tillage straw mulching precision seeder.