An interesting metal-organic framework (MOF) PFC-31 was synthesized by a simple solvothermal reaction.X-ray crystallography reveals that PFC-31 crystallizes in monoclinic system,space group P21/c with a =6.8410(17),b =20.123(5),c =7.689(2) (A),β =104.239(7)°,V=1026.0(5) (A)3,Z=2,C16H22CuN4OsS2,Mr =526.03,μ =1.322 mm-1,Dc =1.703 g/cm3,F(000) =542,GOOF =1.214,R =0.0975 and wR =0.2324.According to X-ray analysis,PFC-31 shows one-dimensional chain constructed by Cu(Ⅱ) centers coordinating with two pyridine groups,two sulfonate groups and two DMF molecules.Owing to the orderly functionalized sulfonate group and Lewis metal sites,PFC-31 exhibits good catalytic capability for CO2 cycloaddition of epoxide under normal pressure and temperature.