One new polyoxometalate-based coordination polymer with 2,6-bis(1-imidazoly) pyridine (L) as the ligand,[Ni(L)(HL)(H2O)(H2W12O40)0.5·H2O]n,has been synthesized under hydrothermal method and characterized by IR spectra,single-crystal X-ray diffraction,powder X-ray diffraction (PXRD),elemental analyses and thermogravimetric analyses (TGA).It crystallizes in orthorhombic,space group Pnma with a =20.169(7),b =23.924(8),c =15.333(5) (A),V =7398(4) (A)3,Z =8,F(000) =6992,Dc =3.488 Mg/m3,Mr =1942.32,μ =19.177 mm-1 and the final R =0.0299,wR =0.0551.In the title compound,each Ni(Ⅱ) atom is bridged by two ligands L to form Ni2L2,which are further connected into a one-dimensional chain structure by coordination with[H2w12O40]6-polyoxoanions,and thus the ultimate 3D framework is constructed via different hydrogen bonding interactions.In addition,the cyclic voltammograms,magnetism,luminescence and photocatalytic activity towards RhB are investigated.The title compound exhibits antiferromagnetic behaviors,luminescent behaviors at solid state and photocatalytic activity to RhB.