Nowadays material civilization and spiritual civili zation of human beings have been rapidly developing ; sports dance has become a sports event that is favored by people. Due to China covers a vast geographic area and has a large population, sports dance development suffers many factors influence as economic level is limited , people acceptance levels are not enough and so on .When re search on sports dance development relative problem s, excessive such factors will lead to inconvenience i n researching. The paper takes sports dance develop ment as research objects, takes teachers, referees, athlete s’ three types of population questionnaire survey r esults as evidence, targeted at economic level, competition system, sci entific research level and other thirteen influence factors to make principal component analysis. Analysis result indic ates that two main components can replace the thirt een influence factors. The two principal components are three inf luence factors’ linear combination, the differences between the two is that every factor weight is different.