A new copper(Ⅱ) coordination polymer [Cu_2(C_7H_5N_4)_2(3-C_6H_5NO_2)_2]_n (1) has been hydrothermally synthesized with copper hydroxide, 3-(pyridin-2-yl)-1,2,4-triazole (Hpt) and 3-pyridinecarboxylic acid (3-PCA). It crystallizes in the monoclinic space group C2/c, with a = 16.854(2), b = 7.8616(8), c = 20.630(2) A,β = 111.126(2)°,V=2549.7(5) A~3,D_c= 1.723 g/cm~3,Z = 8,F(000) = 1336,the final GOOF = 1.065, R = 0.0380 and wR = 0.0972. The whole molecule consisting of two copper ions are bridged by two μ_2-η~1:η~0-3-(pyridin-2-yl)-1,2,4-t...