The　tetrapod-like　ZnO　nanostructures　prepared　by　hyperthermia　vapour　phase　oxidation　process　are　used　as　the　field　emission　cathode　material.　The　field　emission　cathode　panel　was　fabricated　with　ZnO　slurry　printed　and　sintered.　We　packed　on　the　cathode　panel　and　the　fluorescence　panel,　which　is　printed　with　phosphor　power　as　a　5　inch　field　emission　display　of　diode　structure.　The　field　emission　experiments　were　carried　out　and　the　panel　can　realize　stable　field　emission,　it　could　display　simple　the　electric　field　reaches　5.3　V/μm,　the　emission　current　density　can　approach　to　5.11　μA/cm2.　We　obtained　the　electric　field　enhancement　factor　about　6772　by　the　experiment.　The　experimental　results　show　that　tetrapod-like　ZnO　nano-material　has　good　electron　emission　performance　and　it　is　also　a　beautiful　field　emission　cathode　material.