The present invention relates to the field of pharmacy and provides a crystalline form of the compound (3aR,6aR)-N-(4-(3-ethynylphenylamino)-7-methoxyquinazolin -6-yl)-1-methyl-hexahydropyrrolo[3,4-b]pyrrole-5(1H)-carboxamide, a pharmaceutical composition thereof, and preparation processes and use thereof.本發明屬於藥學領域,提供了化合物(3aR,6aR)-N-(4-(3-乙炔基苯胺基)-7-甲氧基喹唑啉-6-基)-1-甲基-六氫吡咯並[3,4-b]吡咯-5(1H)-甲醯胺的晶型、其藥物組合物,及其製備方法和應用。