There will be some problems when subsoiling, such as the large residual of clods and heavy load of the device. The interactional subsoiller-stubble was designed for solving these problems. According to the kinematics analysis and field test, the excursion of the included angle between the blade curve and the ground was sure to be 10°~70°, the minimum radius of the stubble chopper was 180mm, the middle radius was 215mm, the maximum radius was 235mm, and the minimum distance between subsoiler and stubble chopper was 20mm. The design was verified to be reasonable by discrete element simulation experiment. The field test indicated that to compare the interactional device with reference indicator, the stubble ratio was increased by 10.92%, the rate of crushing soil was increased by 6.04% and the oil consumption was decreased by 31.39%. Contrast test showed that under the same operating mode, to compare interactional subsoiler-stubble chopper with subsoiler-stubble chopper, cutting disc and the stubble chopper with breach, the average stubble ratio was increased respectively by 3.53%, 19.38% and 8.86%;under different operating modes, compared with subsoiler-cutting disc, when the average load was decreased by 20kg, the stubble ratio was increased by 13.8%, when the average load was decreased by 40kg, the stubble ratio was increased by 5.82%;compared with the stubble chopper with breach, when the average load was decreased by 20kg, the stubble ratio was increased by 4.5%, and the oil consumption was decreased by 12.79%. The interactional device had a better performance when the load was reduced.