Agricultural non-point source pollution treatment slope and construction method thereof

The invention relates to an agricultural non-point source pollution treatment side slope and a construction method thereof.The agricultural non-point source pollution treatment side slope comprises a side slope body and a farmland located at the top of the side slope body, the side slope body is sequentially provided with at least two filtering and purifying modules in the inclination direction of the slope surface, and each filtering and purifying module comprises a concrete layer arranged on the slope surface of the side slope body; farmland recession water is prevented from seeping into the lower layer; the pebble bed is located above the concrete layer and used for reducing soil loss; the soil layer is positioned above the pebble layer and is used for farmland recession adsorption and biodegradation; the vegetation retention layer is located above the soil layer and used for water and soil conservation and purification; the filter material filling layer is located on the same side of the pebble bed, the s