Abstract: Existing micro-ridge seedbed preparation devices can often be equipped with conventional rotary tillage. However, the shallow tillage depth has been confined to the suboptimal operational efficiency. Particularly, the rapeseed cannot resist extremely adverse climates during optimal sowing and seedling in the current cultivation. In this study, a shallow plow was proposed with the high-speed micro-ridge direct seeding for rapeseed. Three sequential functions were integrated: 1) high-speed strip shallow tillage. A "lift-first and throw-later" mechanism was utilized to rapidly form the ridges using directional soil throwing; 2) micro-ridge seedbed shaping. The geometric configuration of the ridges was optimized to enhance the soil structure, and 3) sowing on ridge tops and furrows. The moisture was regulated to improve the stress resilience and yield stability of the rapeseed in the micro-ridge system. According to the operational requirements of the high-speed strip shallow tillage, a directional soil-throwing shallow plow was developed for the soil displacement at high speed. The micro-ridge morphology was analyzed for the curved surface of a variable-pitch twisted spiral plow body. The plowshare parameters were then determined: a cutting-edge angle of 120°, an entry angle of 30°, and a plowshare width of 120 mm. A mathematical model was established for the shallow plow guide curve. A kinematic analysis was also conducted on the soil lifting and throwing. Single-factor experiments were performed using EDEM software. A systematic investigation was also made on the effects of the shallow plow height, shallow plow opening, and end helix angle on the directional soil-throwing performance. A central composite design (CCD) with two factors (shallow plow opening and end helix angle) and five levels was implemented to determine their interactions on the directional soil-throwing performance. The optimal combination of the parameters was identified after iterative simulation and optimization: the shallow plow height of 375 mm, shallow plow opening of 200 mm, and end helix angle of 40°. Field experiments were conducted on the sandy clay loam and loam soil. The shallow plow achieved better soil-throwing performance at the high speed (12 km/h), compared with the conventional speed (4 km/h). Furthermore, the directional soil throwing was enhanced under the high-speed operation. There were well-defined furrows and strip-shaped soil accumulation in ridging zones. Key metrics included a soil flow back ridge-furrow ratio of 26.18%, a soil-directed migration ratio of 57.42%, and a soil throw accumulation height of 160.60 mm. The better operational passage of the machined to the stable ridge with a ridge height of 148.64mm and a ridge width of 349.6mm. The coefficients of variation were less than 5% for the ridge height and width. The high stability was also achieved in the directional soil throwing position, soil quantity, and throwing accumulation height, thus fully meeting the micro-ridge requirements. Furthermore, directional soil-throwing with the shallow plow can be expected for optimal operational passage in the high-speed micro-ridge seedbed preparation. Seedling emergence validated that the micro-ridge seedbed configuration fully met the agronomic requirements for the rapeseed direct-seeding. These findings can provide a viable technical pathway to develop high-quality rapeseed seedbeds for micro-ridge direct seeding.