A　new　2D　bilayer　honeycomb　zinc　complex　of　{[Zn-2(atz)(3)(N-3)]center　dot　H2O}(n)　(1)　(atz=5-amino-tetrazolate),　has　been　synthesized　under　the　hydrothermal　condition　and　characterized　by　elemental　analysis,　IR　spectroscopy　and　single-crystal　X-ray　diffraction.　The　crystal　structure　of　1　is　of　monoclinic,　space　group　C2/m　with　a=1.039　7(2)　nm,　b=1.792　7(4)　nm,　c=1.109　2(2)　nm,　V=1.887　0(7)　nm(3),　Z=4.　Complex　1　is　built　from　N-3(-)　anion　and　in-situ　generated　5-amino-tetrazolate　ligand.　The　topological　net　of　1　shows　a　unique　four-connected　hexagonal　bilayer　＂hcb＂　topology　(honeycomb　network).　Thermal　stability　and　luminescent　property　of　the　complex　have　also　been　investigated.　CCDC:　722571.