Physical exercises have important effects on improving physical quality, soothing mood, and adjusting mental states aspects. Teenager is main force in physical exercises, and different genders because of physical technology and other aspects differences, their physical exercises efficiency also has significant differences. The paper utilizes grey correlation degree method and variance analysis method, studies on Chinese teenager physical quality and physical exercises gender differences. Firstly, establish teenager exercises habits and physical quality study model, by calculating correlation degree value, comparing its size, analyze different genders physical exercises habits and their weight changes when carry on jogging and walking, three big balls sports, swimming , sports dance, and roller skating five kinds of sports activities. Secondly, establish different genders physical exercises habits significance model on physical quality impacts, make comparative analysis of data, and observe its significance differences. And then get conclusion: jogging and walking, three big balls sports, swimming have bigger impacts on schoolboys, while jogging and walking, three big balls sports, sports dance have bigger impacts on schoolgirls. Among them, jogging and walking have significant impacts on improving schoolgirls’ physical quality aspects, and three big balls sports have significant impacts on improving schoolboys’ physical quality aspects.