A kind of seedbed preparation technology scheme consisted of “left-turn disc plough group burying stubble,reverse rotary knife roll crushing soil,side mounted plough ditching furrow” was put forward to resolve the working conditions of high rice stubble,heavy soil adhesion and large fluctuation of water content in the rice-rapeseed rotation area and the production practice that the single function tillage machine is not conducive to scramble for farming time and compacts soil as it repeatedly works in the fields. A kind of rapeseed directseeding seedbed preparation machine combined driving type disc ploughing with reverse rotary tilling was designed. The machine is mainly composed of driving disc plough group,reverse rotary blade roller,front ditch plough and rear ditch plough and soil-flated plate,which can realize the functions of surface flatting,seedbed crushing,straw burying and furrow ditching. The spatial layout design principle of each tillage part was analyzed. The structure and working parameters of the driving type disc plough group and the counterrotating cutter roller were determined. The result of field test showed that the average value of tillage depth,furrow depth,furrow width,compartment flatness,the rate of soil pulverizing and straw burying in seedbed after preparation machine operation was 173.2 mm,190.2 mm,401.4 mm,11.6 mm,95.9% and 90.2%,respectively. The average value of stability coefficient of tillage depth,furrow depth and furrow width was 85.6%,86.7% and 84.6%,respectively. It can meet the agronomic requirements of seedbed preparation for rapeseed mechanized direct-seeding.