Abstract: A method of the preparation of standard radioactive solution of ~(241)Am isdeveloped by radiochemical separation and puritication. The composition of ~(241)Amsolution and it's stability and radioactivity measurement of ~(241)Am are systema-tically studied. The results of the intercomparison of its radioactivity measurementsare good, and applications of the standard radioactive solution of ~(241)Am aresatisfactory.