NOVELTY - Forming titanium dioxide nanobelt modified by palladium-copper involves: adding strong base and nm titanium dioxide or organic titanium to water, stirring and mixing, sealing in polytetrafluoroethylene hydro-thermal reaction vessel, placing in oven at 150-180 degrees C, standing; washing product with water, and hydrochloric acid; centrifuging material, heating precipitate; placing dry powder in muffle furnace; ultrasonically nano-dispersing copper chloride and palladium chloride in titanium dioxide, stirring until solvent dries; drying, and placing residue into muffle furnace for calcining.    USE - For preparation of titanium dioxide nanobelt modified by Pd-Cu (claimed), which is useful for oxidation of carbon monoxide for environmental protection, and in fuel battery, sensor and other fields.    ADVANTAGE - The method for preparation of titanium dioxide nanobelt modified by Pd-Cu has simple synthesis technique, allows preparation of catalytic material at normal temperature, and produces catalyst having high catalytic efficiency for oxidation of carbon monoxide, long stable activity, high mechanical strength, and thus can be widely used.    DETAILED DESCRIPTION - Method for preparation of titanium dioxide nanobelt modified by Pd-Cu involves: adding strong base and nm titanium dioxide or titanium organic precursor to de-ionized water, uniformly stirring and mixing solution in polytetrafluoroethylene hydro-thermal reaction vessel, screwing and sealing vessel, placing at 150-180 degrees C in constant temperature oven, standing to react for 6-12 hours; repeatedly washing reaction product with de-ionized water until pH is 7-8, and then using 0.1-0.5 mol/L hydrochloric acid to wash for 3-5 times; centrifugally separating material obtained in previous step, heating precipitate to 50-70 degrees C in oven to dry; placing dried powder for 3-8 hours in muffle furnace at 450-700 degrees C to obtain titanium dioxide; ultrasonically nano-dispersing copper chloride and palladium chloride in titanium dioxide, continuously stirring until solvent naturally dries; evaporating residue to dryness, and placing into muffle furnace for calcining at 250-350 degrees C for 4-6 hours to obtain titanium dioxide nanobelt modified by Pd-Cu.