A　preparation　method　of　ZnO/Ag　bilayer　negative　feedback　cathode　electrodes　was　proposed,　which　can　remarkably　improve　the　field　emission　properties　of　carbon　nanotube　(CNT)　films.　Direct　current　magnetron　sputtering　was　adopted　to　deposit　Zn　film　on　strip　sliver　electrodes,　and　then　thermal　oxidizing　and　wet　etching　were　employed　to　fabricate　ZnO/Ag　bilayer　strip　electrodes.　Compared　to　monolayer　electrodes　of　silver　and　indium　tin　oxide,　the　bilayer　electrode　not　only　possesses　adequate　negative　feedback　or　limiting-current　resistance　to　suppress　over-current,　but　also　induces　the　linear　resistance　to　ensure　luminescence　uniformity.　When　the　thickness　of　as-deposited　Zn　layer　increased　from　40　nm　to　120　nm,　the　morphology　of　thermal　oxidizing　ZnO　changed　from　islanded　grains　to　continuous　film.　Thus,　the　ZnO/Ag　bilayer　electrode　has　smoother　surface　than　sliver　electrode.　The　limiting-current　resistance　was　increased　and　the　negative　feedback　ability　was　enhanced.　The　field　emission　characteristics　of　CNT　film　cathode　prove　that　the　ZnO/Ag　bilayer　electrode　can　decrease　the　fluctuation　of　CNT　field　emission　current,　and　improve　device　stability　and　lifetime　effectively.