如今随着互联网的普及，社交媒体的广泛使用已成为当代大学生社交和信息获取的主要渠道之一。社交媒体的普及给大学生的生活带来了许多便利，但也带来了一些潜在的心理健康上的问题。因此，对社交媒体使用与大学生心理健康的研究变得越来越重要。

本文深入探讨了社交媒体使用对大学生心理健康的影响以及内在的影响机制，提出了社会支持作为中介变量以及社会比较倾向作为调节变量，基于社交媒体使用对心理健康的影响机制建构了模型，又配合问卷调查对大学生群体进行实证研究。本研究以大学生社交媒体使用者为研究对象，对不同年龄、性别、受教育程度与专业的720名大学生进行了社交媒体使用强度、社会支持、社会比较倾向以及心理健康的问卷调查，使用SPSS26.0与PROCESS插件对回收的709份有效样本进行统计学分析。研究结论如下：

第一，社交媒体使用强度、社会支持、社会比较倾向都处在中等偏上的水平，其抑郁、焦虑以及生活满意度也处在中等水平。

第二，通过检验性别、年龄、受教育程度以及专业在各变量中的差异性得出结论：仅性别在社交媒体使用强度上存在显著差异性；性别、年龄、受教育程度、专业在社会支持和社会比较倾向上均不存在显著差异；年龄在抑郁、焦虑方面存在显著差异，而在生活满意度中不存在显著差异，并且性别、受教育程度与专业在抑郁、焦虑以及生活满意度中均不存在显著差异。

第三、社交媒体使用强度、社会支持、社会比较倾向及抑郁之间两两显著正相关；社交媒体使用强度、社会支持、社会比较倾向及焦虑之间两两显著正相关；社交媒体使用强度、社会支持、社会比较倾向及生活满意度之间两两显著正相关。

第四，社交媒体使用强度与抑郁、焦虑以及生活满意度有显著的正向影响。

第五，社会支持在媒体使用强度与抑郁、焦虑、生活满意度之间起到中介的作用，社会比较倾向调节了社会支持的中介作用。

基于此，本研究提出三条建议以期有效缓解社交媒体使用对大学生心理健康带来的负面影响。一是通过社交媒体开展大学生心理健康宣传教育活动；二是构建完善的社会支持网络；三是客观看待并利用好社会比较。

Today, with the popularity of the Internet, the widespread use of social media has become one of the main channels for college students to socialize and obtain information. The popularity of social media has brought a lot of convenience to college students' lives, but it has also brought some psychological problems. Therefore, research on social media use and mental health of college students is becoming increasingly important.

This paper deeply discusses the impact of social media use on college students' mental health and its internal mechanism, puts forward social support as an intermediary variable and social comparison tendency as a moderating variable, builds a mechanism model of social media use's impact on mental health, and then conducts an empirical study on college students by means of questionnaire survey. Taking college students' social media users as the research object, this study conducted a questionnaire survey on the use of social media, social support, comparison tendency and mental health of 720 college students with different ages, genders, education levels and majors. SPSS26.0 and PROCESS plug-in were used for statistical analysis of the recovered 709 valid samples. The results are as follows:

First, the participants' intensity of social media use, social support, and social comparison were above average, as well as their depression, anxiety, and life satisfaction.

Second, by examining the differences in variables such as gender, age, education level, and major, it can be concluded that only gender has significant differences in the intensity of social media use; There are no significant differences in social support and social comparison tendency based on gender, age, education level, and major. However, age does show significant differences in depression and anxiety, while no significant difference is observed in life satisfaction.Gender, education level, and major do not show significant differences in depression, anxiety, and life satisfaction.

Third, social media use intensity, social support, social comparison tendency, and depression were significantly positively correlated. Intensity of social media use, social support, social comparison tendency, and anxiety were significantly positively correlated. Intensity of social media use, social support, social comparison tendency, and life satisfaction were significantly positively correlated.

Fourth, the intensity of social media use has a significant positive impact on depression, anxiety and life satisfaction.

Fifth, social support plays a mediating role between wechat use intensity, depression, anxiety, and life satisfaction, and social comparison moderates the mediating role of social support.

Accordingly, this study presents three suggestions for effectively mitigating the negative effects of social media use on college students' mental health. The first is through social media college student mental health outreach and education; Another is creating the perfect social support network; Third, watch and use social comparison well.