Subsoiling technology is an important method in conservation tillage. The effect that the plough pan was broken by bionic subsoiler was successfully simulated by EDEM in this paper. The force of mole’s paw in soil excavation was first analyzed by mathematical model, and then bionic subsoiler meeting the excavation requirements was designed by combining the structure of mole’s claw with standard subsoiler. The breaking situation of plough pan and the stress state of the subsoiler were analyzed in EDEM and verified in both soil bin test and field test. The results showed that the bionic subsoilers could effectively improve the breakage effect of the plough pan, and the greater the width of disturbance of plough pan was and the better the subsoiling effect was. Compared with standard subsoiler, the soil looseness of the plough pan formed by bionic subsoiler-C increased by 18.2% at the tillage depth of 300 mm, 20.0% at the tillage depth of 380 mm and 20.6% at the tillage depth of 460 mm, respectively. The Critical depth of subsoiling was 380 mm, where the best breakage effect of plough pan and soil looseness of the soil layer were obtained at low energy consumption. Soil bin and field tests could prove that the bionic design of the subsoiler decreased the draft force, and increased the width of disturbance of plough pan, which was consistent with the analysis results of EDEM. The bionic subsoilers could better break the plough pan and improve the farming quality of the soil.

深松技术是保护性耕作的重要方法。本文利用EDEM成功模拟了仿生深松机破坏犁盘的效果。首先通过数学模型分析土体开挖中鼹鼠爪的受力，然后将鼹鼠爪的结构与标准深松机相结合，设计出满足开挖要求的仿生深松机。在EDEM中分析了犁盘的断裂情况和深松机的受力状态，并在土仓试验和现场试验中得到验证。结果表明，仿生深松机能有效提高犁盘破土效果，犁盘扰动宽度越大，深松效果越好。与标准深松机相比，仿生深松机-C形成的犁盘的土壤松散度在300 mm耕深下增加18.2%，在380 mm耕深下增加20.0%，在460 mm耕深下增加20.6%。深松临界深度为380 mm，低能耗下犁盘破碎效果和土层松散度最佳。土仓和现场试验证明，深松机的仿生设计降低了拔模力，增加了犁盘扰动宽度，与EDEM分析结果一致。仿生深松机可以更好地打破犁盘，提高土壤的耕作质量。深松临界深度为380 mm，低能耗下犁盘破碎效果和土层松散度最佳。土仓和现场试验证明，深松机的仿生设计降低了拔模力，增加了犁盘扰动宽度，与EDEM分析结果一致。仿生深松机可以更好地打破犁盘，提高土壤的耕作质量。深松临界深度为380 mm，低能耗下犁盘破碎效果和土层松散度最佳。土仓和现场试验证明，深松机的仿生设计降低了拔模力，增加了犁盘扰动宽度，与EDEM分析结果一致。仿生深松机可以更好地打破犁盘，提高土壤的耕作质量。