This paper discusses the importance of physical fitness of soccer players and demand. Through the analysis of the literature and summarize: the characteristics of the physical requirements of football and its physical demands, including physical exertion in a football match, mostly dominated by aerobic metabolism. Football scrimmage in the short sprint, jump, tackle and other action, the anaerobic energy release, is to determine the pace of the players, and jumping ability, an important factor, also raised the football fitness training need to pay attention focus on training methods. In addition, stressed the important of physical fitness training of soccer players and team. These factors tend to be a key factor of the results of the competition.