Abstract: This study uses Dartfish5.5 softwareat the speed of 25 frames/s to analyzethe technical styles and characteristics of elite men’s 100m breaststroke swimmers including Kosuke Kitajima, Hansen, ZhiXie, Vanderburgh from the competition improvement phase to the competition maintenance phase. The results are as follows: (1)The key to the elite men’s 100m breaststroke swimmers’ success is to maintain a high stroke frequency. (2) Elite men’s 100m breaststroke swimmers have the following technical characteristics: The body is in a high and flat position; trunk, waist and legsare in coordinated motion; leg motion features narrow and quick recovery, and narrow kick; arms have wide and deep pull.(3)Elite men’s 100m breaststroke swimmers’horizontal speed of gravity exhibits the characteristic of obvious "double dip double peak". Kick and pull are the two main movements to generate propulsive force, the maximum speed within the cycle of a single movement occurs when armsstroke inside, while kick produces stronger propulsive force than pull.Therefore, more attention needs to be paid to improving legtechniques.

Key words: elite men swimmers, 100m breaststroke, technical development