The present invention provides a method for producing high-purity eldecalcitol crystals by a simple process. According to the present invention, the residual amount of an organic solvent remaining in the eldercalcitol can be adjusted below a standard value set by the drug residual solvent guideline by using a mixed solvent of water and an organic solvent as a crystallization solvent, and the high-purity eldecalcitol crystals can be produced by the simple process.COPYRIGHT KIPO 2018본 발명은 고순도의 엘더칼시톨 결정을 간단한 공정에 의해 제조하는 방법을 제공한다.
