The present disclosure relates to novel crystalline forms of PLX3397 hydrochloride and processes for preparation thereof. The crystalline forms of PLX3397 hydrochloride provided by the present disclosure have higher solubility, larger particle size which is favorable for separation in the subsequent production process, and good stability, especially mechanical stability. These novel crystalline forms of PLX3397 hydrochloride provide a better choice for PLX3397 drug products and are of great value for drug development.
