The　effect　of　field　emission　properties　of　carbon　nanotube　(CNT)　cathodes　on　CrCuCr　thin-film,　indium　tin　oxides　(ITO)　transparent-film　and　silver　(Ag)　paste　thick-film　were　investigated,　which　prepared　by　screen-printing,　sintered　with　high　temperature.　The　morphologies　of　CNT　cathodes　on　different　electrode　substrates　were　observed　by　scanning　electron　mircroscope　(SEM),　and　the　field　emission　properties　were　characterized　in　the　same　condition　of　1.33×10-5Pa.　The　results　showed　that　three　kinds　of　CNT　cathodes　have　different　field　emission　properties.　The　field　emission　tests　indicate　that　the　turn　on　electric　field　of　the　CNT　cathode　on　CrCuCr　thin-film　is　0.99　V/mm,　the　one　on　ITO　thin-film＇s　2.05　V/mm,　the　one　on　Ag　paste　thick-film＇s　2.46V/mm.　When　the　electric　field　is　3.0　V/μm,　the　brightness　luminosities　of　CrCuCr-cathode,　ITO-cathode　and　Ag　paste-cathode　were　2472,　1889,　587　cd/m2,　respectively.　It　can　be　speculated　that　the　field　emission　property　of　the　CNT　cathode　on　CrCuCr　thin-film　takes　precedence　over　the　others,　and　the　one　on　Ag　paste　thick-film　is　lousiest.