A new solid complex [CuL]（NO₃)₂ ? 6H₂O with the macrocyclic schiff base has been synthesized by the template reaction of copper(Ⅱ)nitrate with O-phenylenediamine and O-phthalicaldehyde in absolute ethane medium. The characteristics of the products have been analyzed by elemental analysis, IR spectra, UV-visible spectra, molar conductance, magnetic susceptibility，differential thermal analysis (DTA) and thermogravimetry (TG) measurements. Based on these analyses, the composition, structure and symmetry of the complexes have been discussed, meanwhile, the properties and mechanism of electrochromism of the complex are preliminary investigated.