The high resistance and energy consumption of deep tillage operations reduce the economic benefits of conservation tillage. This study is based on an air-assisted wing-shaped deep tillage subsoiler previously developed by the research team. Biomimetic elements from the geometric structures of badger claws and pangolin scales were incorporated into the coupling design applied to the subsoiler tip of the air-assisted wing-shaped deep tillage subsoiler. To better explore the key parameters affecting the reduction in the resistance and wear in the coupled biomimetic deep tillage subsoiler and to identify new variations in the complex coupled biomimetic structure during deep tillage, field experiments were conducted. The results show that, under the experimental conditions of an air pressure of 2.2 MPa, a working speed of 3.31 km/h, and a subsoiler width of 150 mm, the deep tillage specific resistance (SDF) reached 3.12, demonstrating significant drag reduction effects. This research provides a new theoretical basis and practical guidance for the design and application of deep tillage subsoilers.