NOVELTY - Improvement of stability of direct alcohol fuel cell catalyst comprises mixing 70-99% platinum (Pt) catalyst and 1-30% carbon source, and adding a mixed solution of water and organic solvent to obtain a mixture; ultrasonically dispersing the mixture for 1-3 hours to obtain a mixed sizing liquid; drying the mixed sizing liquid at 50-90 degrees C to obtain solid powder; and putting the solid powder in tubular tube and heating for 0.5-3 hours at 300-800 degrees C under the protection of inert gases.    USE - Improvement of stability of direct alcohol fuel cell catalyst (claimed).    ADVANTAGE - The method solves the problem that prior art direct alcohol fuel cell catalyst can weaken the migration and agglomeration of nano-Pt existing on the carbon carrier. It can anchor Pt by coating a layer of carbon on surface around Pt nanoparticle through carbon source carbonization, so that the stability of Pt catalyst can be effectively increased by 20-40%.    DETAILED DESCRIPTION - Improvement of stability of direct alcohol fuel cell catalyst comprises:    (A) mixing 70-99% platinum (Pt) catalyst and 1-30% carbon source, and adding a mixed solution of water and organic solvent to obtain a mixture; ultrasonically dispersing the mixture for 1-3 hours to obtain a mixed sizing liquid; drying the mixed sizing liquid at 50-90 degrees C to obtain solid powder; and putting the solid powder in tubular tube and heating for 0.5-3 hours at 300-800 degrees C under the protection of inert gases; or    (B) mixing 70-99% Pt catalyst and 1-30% carbon source, and adding the mixed solution of water and organic solvent to obtain a mixture; ultrasonically dispersing the mixture for 1-3 hours to obtain a mixed sizing liquid; putting the mixed sizing liquid in hot water reaction kettle to react for 1-24 hours at 90-400 degrees C and 0.1-2 MPa; and drying the product in vacuum drying case.    The carrier of Pt catalyst is a conductive carbon black XC-72, carbon nanotube, mesoporous carbon, conductive carbon black BP2000, titanium dioxide, or tungsten carbide. The Pt catalyst is carrier supported Pt single metal catalyst, carrier supported Pt-M binary alloy catalyst, carrier supported Pt-M complex alloy catalyst, carrier supported core shell PtM catalyst, or carrier supported core shell PtM catalyst. The carbon source is glucose, sucrose, glycogen, starch, cellulose, vitamin C, phenolic resin, or pyrene. The amount of mixed solution of water and organic solvent is 15-30% based on the amount of Pt catalyst, where the ratio of water and organic solvent is 1-20:1-20, and the organic solvent is ethanol, isopropanol, glycol, glycerol, butanediol, tetramethylethyleneglycol, or butanetriol.