Method for establishing nature-simulated ecological farmland

The invention belongs to the field of agricultural environmental protection, and particularly relates to a method for establishing nature-simulated ecological farmland. According to the method, the farmland, trenches, a tractor-ploughing road, farmland buffer zones and a buffer purification pool are established; on the basis of a farmland production function, a farmland ecological function is further exerted, the farmland is utilized for consumption and sinks of environmental nitrogen and phosphorus; through soil carbon sinks on the farmland and biodiversity, non-point source pollution to the farmland is controlled. Through adoption of the method, the functions of the farmland, farmland ridges, the trenches, the tractor-ploughing road and the buffer purification pool in a whole compound system are optimized; the farmland biodiversity is improved, and a farmland planting and breeding compound function and a pollution source control function are extended; farmland ridge buffering, beautifying and economic functions are added, and the non-point source pollution self-purification capability of the farmland is enhanced; the trenches are hardened through ecologicalization, and nitrogen and phosphorus nutrients can be recycled; interception and purification of the non-point source pollution to the farmland are regulated and controlled; an ecological corridor is established, farmland landscapes are beautified, and the ecological value of the farmland is improved.