100m sprint is one of the events that has aroused the worldwide attention.Every 100m world record symbolizes that human being's physical quality amounts to a new stage.The level of man 100m sprinter in our country develops slowly and has a great distance compared with the world-class sprinters.This paper tries to find out the correlation degree between the average speeds in each segment of the top 8 excellent man elite sprinters in the 7th World Track and Field Championship and their achievements through the grey correlation analysis in order to provide the comparative information for our sprinters developing at the world-class level.