The utility model discloses a farmland ecosystem technical field's a slope cropland farmland ecology way canal, it is including two sets of infiltration soil horizons, two sets of be provided with irrigation canals and ditches, left side between the bottom of infiltration soil horizon the right wall of infiltration soil horizon and the left wall of right side infiltration soil horizon all are provided with the vegetation coverage layer, the bottom on vegetation coverage layer is provided with careless tegillum, the top of infiltration soil horizon is provided with the supercrust, the top of infiltration soil horizon is provided with little intercalated duct, little intercalated duct's bottom is provided with geotechnological rete, the bottom of geotechnique's rete is provided with row salt pipe network that catchments, the inner chamber that row's salt catchments the pipe network evenly is provided with the collector pipe, the bottom that row's salt catchments the pipe network is provided with gravel layer, with low costs, easy operation, and the sediment trapping cuts dirtyly, reduces soil erosion and water loss and agriculture non -point source pollution, and the way canal is integrative, has obvious economy and ecological effect, is convenient for popularize and apply by a large scale.