With the increase of training intensity and confrontation of the football sports, more and more injure occurs for football players, especially their ankle joints. Based on the sample of some student with physical education majors, this paper makes some investigations and statistical work on the injury of their ankle joints during their football training classes, analyzes the injury of ankle joints in the course of football training and on the causes as well and finally puts forward some measurements for precaution in the teaching of football training.