The first dorsal metacarpal vascular axial skin flap ofsixty adults were measured by the surface-projectingmethod. The line from the styloid process of the radius to thehead of the second metacarpal bone was designed as the sru-face signs. The result revealed that the surface projection ofthe artery was 0. 5cm lateral to the connecting line,and mostof them were situated at 4-8cm distal to the styloid processof the radius. How to obtain the skin flap quickly ,accurate-ly,approxiately and its application in the hand jnjury were investigated.