In response to the mechanized sowing of winter rapeseed,the seedbed was soiled with soil,and the design and test of seedbed subsoiling and rotating device for rapeseed combined planter was carried out.The technical scheme of combined seedbed with shallow pine and rotary tillage was put forward.In order to solve problems mentioned above,the rational cultivation of the seedbed based on vertical tillage was explored.A seedspinning device for rapeseed was designed with subsoiling rotating tillage combined operation technology and used in the combination with direct seeding machine.A subsoiling shovel for deepening the seedbed strip with deep loosening was developed according to the principle of soil sliding and seedspinning device for rapeseed.The main structural and technical parameters of the device were analyzed and determined.2BYM6/8 direct rapeseed seeder with a working width of 2 000 mm and the subsoiling shovel was used as the main working part.To improve the quality of the seedbed strip,IT245 rotary blade was used for cutting the area of seedbed strip or the area used to grow the crop while IT225 for cutting the area of nonseedbed strip.The layout of the subsoiling shovel arranged in the form of “Four in the front and two in the back”.The performance of seedbed strip was tested in the field.The results showed that the depth of the seedbed strip ranged from 229.4 mm to 239.4 mm,while the depth of the seedbed ranged from 124.8 mm to 139.2 mm.Its depth stability coefficient was more than 90%,with seedbed roughness ranging from 25.71 mm to 27.14 mm.The working effect meets the requirements of design and the sowing agronomy of rapeseed.