Affter the MM theorem is born,economists always highlight the corporate capital structure theory.With the development of china capital market and corporate reform,it is very important to do the capital structure reaserch on Chinese listed corporate.The authors summarize the capital structure character of Chinese listed corporate,reaserches the internal&external influence factors on corporate capital structure,does a empirical test and analysis on these internal influence factors,and finds some findings that are differental from overseas reaserch.