《排球竞赛规则》修改之后，发球区域扩大为９米。在此情况下，运动员的发球位置发生相应变化，这些变化对女运动员的发球效果有哪些影响？通过对女排比赛的统计研究，发现了在不同的发球区域发球与其效果的差异，以及不同的发球路线、落点与效果的关系等等。 After the modification of the Volleyball Rules, the service area expanded to 9 meters. In this case, the athlete’s position changes accordingly, these changes on the impact of the female athletes what effect? Through the statistical research on women’s volleyball competition, we found the difference between serve and its effect in different service teems, as well as the relationship between different serve routes, placement and effect.