The present disclosure relates to novel crystalline forms of compound I and processes for preparation thereof. The present disclosure also relates to pharmaceutical composition containing crystalline forms, and use of crystalline forms for preparing drugs containing selective progesterone receptor modulator, and use of crystalline forms for preparing drugs treating uterine fibroids and/or endometriosis. The crystalline forms of the present disclosure have one or more improved properties compared with prior art and have significant values for future drug optimization and development.
