The paper applies principal component analysis, stu dies on China’s 12th National Games and the 30th Ol ympic Games women heptathlon competition result ranked to p eight athletes result. It analyzes the difference s of Chinese and world athletes each kind of sports events and i ts each individual sports event to total result con tribution rate, studies on Chinese athletes and world athletes over all differences, and looks for Chinese athletes and world athletes total result improvement breakthrough points. Resul t shows that Chinese athlete should focus on traini ng lower limbs strength, enhance Chinese athletes lower limb s explosive power so as to promote and intensify Ch inese athletes speed type event and jumping type event ad vantages. Chinese athletes need to focus on develop ment of 800m and javelin throwing events as Chinese athlete s’ total results improvements breakthrough points. Chinese athletes should put emphasis on their physical qual ity and psychological quality, develop Chinese athl etes each kind of events in an all-round way to improve Chinese at hletes results. While world top athletes should put emphasis on developing throwing events as their total results i mprovements breakthrough points. And meanwhile, wor ld top athletes should also perfect speed kind and jumping kind sports events techniques so as to maintain th eir advantages of contribution rates to total results to consolida te their women heptathlon event overall advantages.