Multi- wall carbon nanotubes(MWNTs) were synthesized by thermal chemical vapor deposition. The paste for screen printing was composed of MWNTs, organic vehicle and glass frit. Carton nanotube paste was screen-printed on ITO(indium tin oxide) deposited soda lim을 glass, and then heat treatment was performed. Before the surface treatment, turn on field of derive was 2.6 V/$mu extrm{m}$. After the surface treatment, the value was changed into 1.8 V/$mu extrm{m}$. The anode current of the derive with 2.83 V/$mu extrm{m}$(turn on field) was changed 4 $mu extrm{A}$ into 390 $mu extrm{A}$ at 1,700 V. Adsorption effect of MWNTs onto phosphor of anode plate was observed by the field emission measurement and resulted in bad effects on properties of devices lifetime and emission lighting.