Abstract: Based on the typical region experiments of well-drainage and well-irrigation and regional hydrogeological survey data in1/200000,this reporthas approached the problem of transforming the swamp by means ofgroup well-drainage and irrigation of a large area in the micro-pressurewater region of northeast Sanjiang Plain,through the calculation of thefalling depth of water level both in partly interferring recovery andregional evenly spaced well layout,and balanced calculation between theunderground storage capacity and drain-quantity of surface waterrequired.The priliminary theoretical basis for enlarging experiments andextending applications on the new measure of well-drainage and well-irrigation is thus provided.