Drid area grit gravel grit gravel stone river current ecological repairing river course infiltration reduction method

The invention discloses a river permeability reducing method in arid area grit stone river ecology restoring project, which comprises the following steps: mixing sodium bentonite and local soil to mixed soil evenly with dry weight ratio 1 : 9; mixing the mixed soil and grit material evenly with dry weight ratio at 4 : 6; forming permeability reducing mixed material; paving the permeability reducing mixed material layer on the compacted river bed; paving local soil permeability reducing layer; vibrating and packing together; back-paving on site ballast on the permeability reducing layer as covering layer. This invention possesses distinctive economic benefit, which can be used to permeability reducing agent project of river, lake and marshland.