The　diode　field　emission　display　(FED)　has　high　driving　voltage,　which　brings　trouble　to　driving　circuit.　In　order　to　solve　this　problem,　we　design　normal　grid　triode　structure　tetrapod-like　nano-ZnO　FED.　The　field　emission　property　is　investigated.　The　results　show　that　the　structure　is　feasible.　With　abrasive　blasting　and　lithographic　technology,　grid　apertures　of　the　normal　grid　structure　have　been　created,　and　low　voltage　control　is　achieved.　The　grid　voltage,　the　gate　apertures　size　and　the　thickness　of　medium　layer　parameters　which　influence　the　performance　of　triode　FED　have　been　analyzed.　The　experimental　results　show　that　normal　gate　triode-structure　tetrapod-like　nano-ZnO　FED　has　well　electron　emission　performance　and　it　is　also　a　potential　field　emission　display.