NOVELTY - Graphitizable carbon powder as raw material is used and platinum base catalyst and transition metal catalyst capable of producing carbon nanotube are doped, pressed into a cylindrical or square bar, and sintered to obtain anode carbon bar. Anode carbon bar and pure carbon bar are used as anode and cathode, respectively, and direct current electric arc discharging method is performed. Electric arc discharging is performed between anode and cathode, and heat-processed to obtain platinum base electric catalyst-loaded single-walled carbon nanotube.    USE - Manufacture of platinum-based electric catalyst-loaded single-walled carbon nanotube for proton exchange membrane fuel cell.    ADVANTAGE - The platinum-based electric catalyst-loaded single-walled carbon nanotube is manufactured with favorable stability, electrical property and chemical property.    DETAILED DESCRIPTION - Graphitizable carbon powder as raw material is used and platinum base catalyst and transition metal catalyst capable of producing carbon nanotube are doped, pressed into a cylindrical or square bar, and sintered in inert gas atmosphere at 800-1200 degrees C and 1400-2000 degrees C to obtain anode carbon bar. The anode carbon bar contains (in wt.%) carbon powder (55-75), platinum (20-40), iron, cobalt or nickel (4-6) and yttrium (0-1). Anode carbon bar and pure carbon bar are used as anode and cathode, respectively, and direct current electric arc discharging method is performed at air pressure of 200-760 Torr in hydrogen, argon or helium. Electric arc discharging is performed between anode and cathode to obtain platinum base electric catalyst-loaded single-walled carbon nanotube crude product. The discharging current is 50-200A and distance between anode and cathode is 204 mm during discharging. The crude product is heat-processed in hydrogen or air at high temperature, and graphite adhered on surface of the catalyst is removed to obtain platinum base electric catalyst-loaded single-walled carbon nanotube. The temperature of hydrogen is controlled at 700-900 degrees C. The temperature of air is controlled at 300-500 degrees C.