The present invention relates to a kind of improved crystallization procedures, the crystallization procedure obtains the canagliflozin hemi-hydrate crystalline with narrow size distribution in the following manner: from the sub-fraction crystallization suspension removed in the container in crystallisation vessel and the part being made to be subjected to being formed by the granularity reduction of crystal, then heats and be again reintroduced to the crystallization suspension of the part in the crystallisation vessel being maintained in specific range of temperatures.
