Novel α-cellulose membranes were prepared by using amine oxides as solvent．The mechanical performance

liquid permeation rates and the chemical resistance of the membranes were investigated．The tensile strength of the α-cellulose membranes can be up to 133.3 Mpa and 30％～60％ stronger than the cellulose membranes prepared from other methods．The retentate ratio of bovine serum albumin of the α-cellulose membranes can be up to 98％

and the liquid flux of the membranes can keep constant in a rather large pH range from pH1 to pH9．The effect of membrane preparation process on the performances of α-cellulose membrane was also revealed by comparatively studying the performances of other cellulose membranes which using different methods prepared．