A new inorganic-organic hybrid framework microporous material Cd3(BDC)0.5(BTC)2· (DMF)(H2O)·3DMF·H3O·H 2O, in which two kinds of carboxylate ligands coordinate with cadmium ions synchronously, was obtained under a mild synthesis condition. The titled compound is crystallized in a monoclinic system, space group P2(1)/c with a=1. 584 7(7) nm, b=1.426 7(6) nm, c=1. 936 3(6) nm, β=113. 186(7)°, V = 4. 024 6(3) nm3, Z = 4, Dx=1. 947 mg/m3, Mr=1 179. 92, μ=1. 662 mm-1, F(000) = 2 344, R = 0. 074 8, wR = 0. 215 1. Three cadmium centers link with each other through BDC or BTC ligand to form a 3-D open framework.