The present invention discloses novel crystalline and non-crystalline forms of 3-((3R, 4R)-4-methyl-3-[methyl-(7H-pyrrolo[2, 3-d]pyrimidin-4-yl)-amino]-pip-eridin-1-yl)-3-oxopropionitrile, pharmaceutical composition containing the same, preparations thereof and the uses thereof.本發明揭示新穎結晶及非結晶形式之3-((3R,4R)-4-甲基-3-[甲基-(7H-吡咯并[2,3-d]嘧啶-4-基)-胺基]-哌啶-1-基)-3-側氧基丙腈、含有其之醫藥組合物、其製備及其用途。