羽毛球作为我国的“第二国球”，在国际羽坛长期处于霸主地位，尤其是女单。但随着新赛制的实施，各国运动员的崛起，我国的霸主地位开始被动摇。陈雨菲作为我国现如今最为优秀的女子单打运动员，在羽坛排名中曾登顶世界第一，在2020年东京奥运会中也曾取得女单冠军，但是在2020-2022年间，陈雨菲连续5次败于山口茜。因此本文采用文献资料法、录像观察法、专家访谈法、数理统计法和对比分析法5种研究方法，通过观看陈雨菲与山口茜的5场12局的比赛视频，将双方的发球、接发球、全场技术应用以及得失分情况进行对比分析，进而得出以下结论：两人作为世界顶级选手，无论发球还是接发球，成功率都非常高，但仍存在明显的差异。在发球上，陈雨菲发球方式较为单一，而山口茜发球多变，不易让对手找到规律。在比赛过程中，陈雨菲仍采用其擅长的“拉吊结合”，山口茜打法则更偏向于男性化，进攻也更为犀利。在5场比赛中，两人的得分主要来自于自身的主动进攻和对手的非受迫性失误。并且两人有着较强的相持能力，最高相持达48拍。

In China,as “the second national ball”, badminton has a dominant position in the international badminton competition for a long time, especially in women's singles. However, with the implementation of the new competition system and the rise of athletes from various countries, the supremacy of our country began to be shaken. Chen Yufei, as the most outstanding women's singles player in China, used to be the top position in the world badminton rankings and won the gold medal of women's singles in the 2020 Tokyo Olympic Games. However, between 2020 and 2022, Chen Yufei lost to Akane Yamaguchi five times in a row. To further analyze their characteristics of badminton playing, this paper adopts five research methods, including literature data analyzation method, video observation method, expert interview method, mathematical statistics method and comparative analysis method. By watching the video of Chen Yufei and Akane Yamaguchi's12 setsof 5 matches, this paper compared and analyzed the serving, receiving, technical application and score and loss of both sides, and then draws the following conclusions：As the world's top two players, both serve and receive atvery high success rates, but there are still significant differences.On the serve, Chen Yufei’s serving mode is more monotonous, while Akane Yamaguchi is more changeful and not easy to let opponents find the rules of her serving. In the process of the matches, Chen Yufei still uses the "combinationmethod" that she is good at, while Akane Yamaguchi's style of playing is more masculine and sharper.In five games, the two players' points came mainly from their own initiative and the opponent's unforced errors. And they have a strong stalemate ability, the highest stalemate up to 48 beats.