随着智能终端、移动互联网、wifi等信息技术的发展，微信朋友圈逐渐发展成为我国用户最多的虚拟社区。国外已有较多人格因素与社交媒体使用相关研究的文章，但是在我国这一部分研究仍不太多，而且大多集中于人格五因素模型。本文通过梳理文献，发现外倾性与社交媒体使用行为之间关联性强，因此将此维度人格剥离人格五因素模型进行纵向研究。通过发放问卷，对423位大学生进行调查并取得了409份有效问卷，研究了外倾性人格与微信朋友圈使用频率、感情依恋，微信朋友圈自我提升行为，微信朋友圈自我呈现之间的关联性，并且基于“社交媒体越用越孤独”话题，展开了社交媒体使用频度与社交隔离之间的关联性研究。经过数据统计发现，外倾性人格对微信朋友圈使用频率、感情依恋有着正向的显著影响，外倾性人格与微信朋友圈自我提升的四种行为有着不同程度的正向的显著影响，外倾性人格对微信朋友圈真实自我呈现有着正向显著影响，对微信朋友圈积极伪装呈现有着负向显著影响。微信朋友圈感情依恋对社交隔离起着正向的显著影响。 本研究揭示了外倾性人格与微信朋友圈使用频度、自我提升行为、自我呈现之间的关系以及微信朋友圈使用频度与社交隔离之间的关系，研究结果为后续外倾性人格与社交媒体使用之间的研究做出了一些探索，同时有助于辅助建立防止大学生社交隔离措施，具有一定理论意义和现实意义。

With the development of intelligent terminals, mobile Internet, wifi and other information technologies, WeChat Moments has gradually developed into a virtual community with the largest number of users in China.There have been many studies on the relationship between personality factors and social media use abroad, but there are still not many studies on this part in China, and most of Chinese studies focus on the Five-Factor Model.Through literature review, this paper finds that there is a strong correlation between extraversion and social media use behavior. Therefore, to get longitudinal study extraversion personality is separated from the Five-Factor Model.423 college students were investigated and 409 valid questionnaires were obtained by issuing questionnaires. We research on the correlation between extraversion personality and WeChat Moments using frequency, emotional dependence,self-promotion behavior and self-presentation. In addition, we also research on the correlation between the frequency of social media use and social isolation based on the topic of "the more social media is used, the more lonely it will be".According to the data statistics, extraversion personality has a significant positive influence on the frequency of WeChat Moments and emotional dependence,extraversion personality and the four behaviors of WeChat Moments self-improvement have different degrees of positive significant influence,extraversion personality has positive and significant influence on WeChat Moments true self-presentation, and negative and significant influence on WeChat Moments positive self-presentation. WeChat Moments emotional dependence on social isolation has a significant positive impact. This study has revealed the relationship between extraversion personality and WeChat Moments use frequency, self-improvement behavior and self-presentation and the relationship between WeChat Moments use frequency and social isolation.The research results provide exploration for the follow-up research on the relationship between extraversion personality and the use of social media.And it can help to establish measures to prevent social isolation of college students, therefore it has certain significance in real life.