▎ 摘　　要

NOVELTY - The method involves processing a carbon nano-tube thin film. A graphene sheet is fixed on the carbon nano-tube thin film adopting a microwave plasma enhanced chemical vapor deposition mode. Graphene sheet-carbon nanotube film composite material is processed by hydrogen plasma at normal temperature, where microwave power is adjusted to 100-140 W, and pressure of a processing chamber is controlled for about 1.5 kPa, and processing time is about 20-60 minutes. High-temperature annealing process is performed to obtain heat-treated nitrogen doped graphene sheet-carbon nano-tube film flexible composite material. USE - Graphene sheet-carbon nanotube film composite material field emission performance optimizing method. ADVANTAGE - The method enables producing sheet-carbon nanotube film composite material with low operating electric field, high current density and field emission stability, and enlarging application range. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene sheet-carbon nanotube film composite material. '(Drawing includes non-English language text)'