Mononuclear complex {[Cu(N-men)2(cda)2]([Cu(N-men)2]((ClO4)2} was synthesized by sodium carbamyldicyanomethanide Na(cda), N-methylethylenediamine and hydrate copper perchlorate. The crystal belongs to the triclinic system, space group P ī with a = 7.229(2), b = 8.114(2), c = 15.936(4) (A), α = 80.511(4), β = 78.993(4), γ= 72.118(4)o, V = 867.6(3)(A)3, Z = 1, C20H44Cl2Cu2N14O10, Mr = 838.68, Dc = 1.605 g/cm3, F(000) = 434 and μ = 1.449 mm-1. The structure was refined to R = 0.0480 and wR = 0.1289 for 2503 observed reflections (I > 2σ(I)). In the complex there exist two kinds of coordination models for Cu (Ⅱ) ions. One is that the Cu (Ⅱ) ion is coordinated by four nitrogen atoms which are from two N-men molecules, and a slightly distorted square planar coordinate environment is formed around the Cu (Ⅱ) ion; the other is that the Cu (Ⅱ) ion is coordinated by six nitrogen atoms, of which four are from two N-men molecules and the left from nitrile groups, resulting in a distorted octahedron around the Cu (Ⅱ) ion. The deposition number of the crystal at CCDC is 161868.