Abstract: Farmland is the cornerstone of food security, while coal is essential for energy supply. However, the problem of farmland damage caused by coal mining is particularly significant in high-water-table plain areas where coal and grain production overlap in China. To address this issue, firstly, a regional subsidence control method based on the collaborative bearing of the filling body and coal pillar is proposed, aiming to balance coal mining efficiency with farmland protection. Using a mining area in Henan Province as a case study, the process of forming the collaborative bearing system of the filling body and coal pillar and its design principles are first analyzed. Subsequently, the effects of different filling rates on the stability of this system are simulated using PFC software. FLAC^3D software is then used to determine the optimal mining parameters that meet farmland protection requirements. The results indicate that the filling body provides lateral support to the coal pillar, enhancing its stability and forming a collaborative bearing system that supports the overlying strata. When the filling rate reaches 85%, cracks in the filling area account for approximately 73.42% of the total, with the filling body playing a major bearing role in the system, which is stable at this rate. Further analysis reveals that the goaf is located in the stress relief zone, while the collaborative bearing system is in the stress concentration zone, with the stress concentration coefficient increasing as the mining width expands. Considering both filling costs and farmland protection indicators, the optimal regional subsidence control mining parameters for this mining area are determined to be a mining width of 160 meters and a filling width of 100 meters. These parameters not only reduce filling costs but also effectively control surface subsidence, meeting farmland protection standards. The results of this study provide theoretical support and engineering references for green mining in coal and grain production areas.