Two UO_2~(2+) complexes {[C_5H_4N(O)C=N-N=C(Ph)-(Ph)C=N-N=C(O)-C_5H_4N]_2UO_2(CH_3OH)}(I) and {[C_5H_4N(O)C=N-N=C(Ph)-(Ph)C=N-N=C(O)-C_5H_4N]_2UO_2(C_5H_4N(O)C=N-NH_2)}(II) were synthesized and characterized by IR,elemental analysis and thermal stability analysis, and the crystal structures were determined by X-ray diffraction.The crystal of complex I belongs to monoclinic system, space group P2_1/n with a = 11.7678(4), b= 16.9667(6), c = 14.3051(5) A,β = 98.918(3)°, Z = 4, V = 2821.64(17) A~3, D_c = 1.837 Mg·m~(-3),µ(MoKa)= 5.805 mm~(-1), ...