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.