Under the conditions of straw mulching in the northeast of China, straw plugging problem often occurs when sowing corn. After the strip-rotating anti-blocking operation, soil and stalks mixing generate some seeds landed on the straw, which reduced seeding quality. Combined with the agronomic and operational requirements for corn planting in the one-year-old ripe area in Northeast China, a device for eliminating stubbles and cleaning seed bed was designed, which was suitable for seeding corn under no-tillage condition. The device was mainly composed of a cutter head, a stubble cutter, a planting-strip cleaning knife and a spring assembly. Force and side-cutting edge curve analysis were performed and the main technical parameters of the two cutting tools were designed. The force model was established for cleaning straws or weeds with planting-strip cleaning knife, and different bending angles were simulated by EDEM discrete element simulation. Using cutting resistance as the optimization indicator, it was confirmed that the optimum bending angle of the planting-strip cleaning knife was determined to be 150°. The cleanliness and soil disturbance after the operation of the two devices were analyzed and compared. The results showed that the average cleanliness of the strips after operation was 86.59%, which was 26.89% higher than that of the traditional strip annihilation device and the soil disturbance quantity was reduced by 2/3, and average torque was reduced by 33.19%. The test and simulation results were basically the same, verifying the reliability of the simulation. In order to study the influence of various factors on the operation performance of the stripping and cleaning device, a three-factor and three-level orthogonal test was designed to determine the factors that had significant impact on the cleanliness of the strip were the working speed and amount of straw mulching, and those on the soil disturbance were the working speed and depth of soil. Field experiments showed that the equipment had good passability and significant anti-blocking effect when straw cover rate was in range of 0.4~1.4kg/m2. The seed bed cleanliness was all above 80%. The research provided the theoretical and technological support for the development of seed bed cleaning devices under the condition of no and minimum-tillage planting. 