本文运用文献资料法和数理统计法 ,对世界及国内优秀 4 0 0 m跑选手的速度和分段成绩与 4 0 0 m跑成绩的关系进行了分析研究。结果表明 ,速度越好、分段速度间及前后 2 0 0 m间成绩差距越小 ,4 0 0 m成绩越好 In this paper, the relationship between the speed and the grade scores of excellent 400m runners both at home and abroad and the run of 400m was analyzed and studied by using the methods of literature review and mathematical statistics. The results show that the better the speed, the smaller the difference in performance between the sectional speed and the front and back 200m, the better the performance is in the 400m