Preparing　process　of　carbon-nanotube　cathode　and　vacuum　package　process　of　field-emission　display　is　researched.　A　carbon-nanotube　cathode　with　good　field　emitting　character　is　prepared　by　a　new　synthesizing　technique.　Using　as　-grown　carbon-nanotube　film　prepared　by　this　technique　as　cathode,　a　field-emission　display　which　can　display　simple　figures　and　digits　is　developed.　An　elastic　assembling　technique　is　also　developed　to　fabricate　FED.　The　samples　display　high　luminance　at　low　drive　voltage　and　the　luminance　is　well　proportional　to　drive　voltage.　This　is　very　convenient　for　the　realization　of　high　luminance　display　and　high　gray-scale　resolution　in　the　future.　The　most　important　achievement　of　this　project　is　that　the　continuous　working　life-time　test　of　this　sample　have　exceeded　5500　hours.　This　result　proves　that　the　stability　of　carbon-nanotube　can　meet　the　requirement　of　most　commercial　products.