A new coordination polymer, [Cd-7(mu (3)-O)(2)(glut)(2)(Hglut)(2)(trz)(4)](n) (1) (H(2)glut = glutaric acid and Htrz = 1,2,4-triazole), has been synthesized under hydrothermal conditions, and further characterized by elemental analysis, IR, thermogravimetric analysis and single-crystal X-ray diffraction. Complex 1 features a fairly complicated three-dimensional (3D) (3,3,6,10)-connected framework constructed from two-dimensional (2D) infinite [Cd-7(mu (3)-O)(2)(glut)(4)(Hglut)(2)](n) layers and [Cd(trz)(4)](2-) units. Moreover, the thermal stability and photoluminescent properties of 1 were also investigated.