The present invention relates to a process for the preparation of 1- (β-D-glucopyranosyl) -4-methyl-3- [5- (4-fluorophenyl) urea having a narrow particle size distribution and improved flowability, bulk density and tap density characteristics. -2-thienylmethyl] benzene hemihydrate crystals.본 발명은 좁은 입도분포와 개선된 유동성, 벌크밀도 및 탭(tap)밀도 특성을 가지는 1-(β-D-글루코피라노실)-4-메틸-3-[5-(4-플루오로페닐)-2-티에닐메틸] 벤젠 반수화물(hemihydrate) 결정을 제조하기 위한 결정화 방법에 관한 것이다.