NOVELTY - A molybdenum sulfide-functionalized carbon nanotube-supported platinum catalyst preparing method involves adding distilled water in vessel equipped with three multi-walled carbon nanotubes (MWCNTs), stirring, centrifuging and drying. The polyaniline modified composite MWCNTs is dispersed in ethanol, sonicated, placed in quartz tube furnace. The molybdenum sulfide functionalized MWCNTs composite is added with ethylene glycol and chloroplatinic acid, sonicated for 2 hours, reacted at 90 degrees C for 24 hours, followed by centrifuging, washing and drying to obtain the finished product.    USE - Method for preparing molybdenum sulfide-functionalized carbon nanotube-supported platinum catalyst for use in direct methanol fuel cell.    ADVANTAGE - The method enables preparing catalyst with good activity, high stability, strong characteristics and strong controllability, in simple and cost effective manner.    DETAILED DESCRIPTION - A molybdenum sulfide-functionalized carbon nanotube-supported platinum catalyst preparing method involves adding 20 mg acidified distilled water in a vessel equipped with three multi-walled carbon nanotubes (MWCNTs), adding 400 mu l concentrated hydrochloric acid and 20-300 mu l aniline monomer, stirring after 12 hours, adding 0.4 g ammonium persulfate, stirring for 12 hours to obtain resulting product. The resulting product is centrifuged, washed and dried under vacuum to give polyaniline modified composite MWCNTs. The polyaniline modified composite MWCNTs is weighed for 10 mg, dispersed in ethanol solution and ammonium thiosulfate, sonicated until complete evaporation of the solvent, placed in quartz tube furnace under nitrogen heat treatment at 300-1000 degrees C for 3 hours to obtain molybdenum sulfide functionalized MWCNTs composite. The molybdenum sulfide functionalized MWCNTs composite is added with ethylene glycol and chloroplatinic acid, sonicated for 2 hours, reacted at 90 degrees C for 24 hours, followed by centrifuging, washing and drying to obtain the finished product.