NOVELTY - The preparation method of multi-walled carbon nanotubes/platinum-copper catalyst based on low eutectic solvent involves adding multi-walled carbon nanotubes to low eutectic solvent, then acidifying and ultrasonically dispersing, dissolving multi-walled carbon nanotubes, anhydrous copper sulfate and chloroplatinic acid in low eutectic solvent, stirring mixture, then adding sodium borohydride, stirring the mixture, reacting the mixture, centrifuging the reaction product, washing the product, and drying obtained product under vacuum.    USE - The method is useful for preparing multi-walled carbon nanotubes/platinum-copper catalyst based on low eutectic solvent, where the catalyst is useful for direct methanol fuel cell.    ADVANTAGE - The method enables simple preparation of multi-walled carbon nanotubes platinum-copper catalyst based on low eutectic solvent with excellent electro-activity, stability and carbon monoxide poisoning resistance under mild reaction condition in an environmentally-friendly manner, improves dispersion of noble metal and electrochemically active surface area, and reduces the size of catalytic nanoparticles.    DETAILED DESCRIPTION - The preparation method of multi-walled carbon nanotubes/platinum-copper catalyst based on low eutectic solvent involves adding 10 mg multi-walled carbon nanotubes to 20 ml low eutectic solvent, then acidifying and ultrasonically dispersing for 2 hours, dissolving multi-walled carbon nanotubes, 1/4 anhydrous copper sulfate and 19.3 mM chloroplatinic acid in low eutectic solvent, magnetically stirring the dissolved mixture for 10 minutes, then adding 60 mg sodium borohydride, uniformly stirring the mixture, transferring the suspension to 30 ml reaction vessel, reacting the mixture at 120-200 degrees C for 3-15 hours, centrifuging the reaction products, washing the product, and drying obtained product under vacuum. An INDEPENDENT CLAIM is included for use of multi-walled carbon nanotubes platinum-copper catalyst based on low eutectic solvent for direct methanol fuel cell.