The title complex,{[Cd2(1,8-nap)2(H2O)2](bpp)2}n(1) ,a cadmium complex based on mixed naphthalene-1,8-dicarboxylate(1,8-nap) and flexible 1,3-bi(4-pyridyl) propane(bpp) ligands,has been hydrothermally synthes-ized.It consists of a one-dimensional chain along c axis,which is derived from dimeric unit [Cd2(1,8-nap)2(H2O)2] linked by a pair of bpp ligands.In every [Cd2(1,8-nap)2(H2O)2] dimeric unit,two 1,8-nap act as bridging ligands to connect two Cd(Ⅱ) atoms,forming a sixteen-membered ring.Each Cd(Ⅱ) atom is in a distorted octahedral environment,coordinated by one aqua,two 1,8-nap and two bridging bpp ligands.In addition,two bridging bpp ligands connected two neighboring Cd(Ⅱ) atoms form a twenty-four-membered ring.The TGA and Luminescence property in solid state of complex 1 have been further studied and discussed in this paper.CCDC:669293.