A Cd(II) complex of ［Cd(H2ASA)2(H2O)2］n(1) was synthesized by solution method using 5-azotetrazolyl salicylic acid (H3ASA) and CdCl2·2.5H2O as raw materials. Structural analysis and characterization were carried out by single crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, infrared spectroscopy, thermogravimetric analysis and UV-Vis spectroscopy. The result reveals that complex 1 crystallizes in the triclinic space group Pī with a=0.702 39(5) nm, b=0.735 15(6) nm, c=1.229 41(7) nm, α=82.557(5)°, β=75.453(6)°, γ=61.882(8)°, V=0.541 90(8) nm3, Z=1, μ=1.083 mm-1, Dc=1.884 g/cm3. Complex 1 features an infinite 1D chain structure formed by the μ2 bridge ligand H2ASA- linking two different Cd(II) ions. The neighboring chains are further self-assembled through O…O, O…N hydrogen bonds and π-π stacking interactions to form a 3D supramolecular network. UV-Vis spectroscopy measurement indicates that complex 1 exhibits photochromic property under 365 nm UV light irradiation.