Reaction of a tripodal ligand, N,N?,N??-tris(3-pyridinyl) phosphoric trimide(TPPA) and CuBr_2·2H_2O result in the assembly of a new polymeric copper coordination polymer, which was characterized by single-crystal diffraction, infrared spectroscopy and elemental analysis. The polymer crystallizes in the triclinic system, space group P1 with a = 9.0964(5), b = 10.2592, c = 10.5822(8) ?, V = 933.01(9) ?~3, Z = 2, C_(30)H_(24)Br_4Cu_3N_(12)O_2P_2, M_r = 985.02, D_c = 1.753 g/cm~3, F(000) = 4072 and μ(MoKα) = 0.746 mm~(-1). The final R and w R are 0.0588 and 0.1329 for 4260 observed reflections with I > 2σ(I). Cu(Ⅰ) is tetrahedrally coordinated and Cu(Ⅱ) center adopts square planar coordination geometry. Because of the flexibility of the TPPA ligands, the pyridyl rings rotate though a certain angle and three pyridyl rings on the same TPPA rotate by about 45° with respect to the central P=O groups. TPPA ligand acts as a tridentate ligand and is coordinated with three metal centers with its pyridyl donors to form a 2D-sheet like structure, and it is further connected by N–H···O and N–H···Br, resulting in a 3D network packing. Oxidation states of the metal center have been determined by bond valence sum calculation. Reaction of a tripodal ligand, N, N ?, N? - tris (3-pyridinyl) phosphoric trimide (TPPA) and CuBr2.2H2O in the assembly of a new polymeric copper coordination polymer, which was characterized by single- , infrared spectroscopy and elemental analysis. The polymer crystallizes in the triclinic system with space group P1 with a = 9.0964 (5), b = 10.2592, c = 10.5822 (8) 2, C_ (30) H_ (24) Br_4Cu_3N_ (12) O_2P_2, M_r = 985.02, D_c = 1.753 g / cm ~ 3, F (000) = 4072 and μ (MoKα) = 0.746 mm -1 final R and w R are 0.0588 and 0.1329 for 4260 observed reflections with I> 2σ (I). Cu (I) is tetrahedrally coordinated and Cu (II) center square planar planar geometry. Because of the flexibility of the TPPA ligands, the pyridyl rings rotate though a certain angle and three pyridyl rings on the same TPPA rotate by about 45 ° with respect to the central P = O groups. TPPA ligand acts as a tridentate ligand and is coordinated with three metal centers w ith its pyridyl donors to form a 2D-sheet like structure, and it is further connected by N-H ··· O and N-H ··· Br, resulting in a 3D network packing. Oxidation states of the metal center have been determined by bond valence sum calculation.