目的：探究错失恐惧在述情障碍和手机成瘾关系间的中介作用。方法：在2022年4月至5月，使用整群 随机抽样的方法在湖北省武汉市四所高校抽取554例大学生，进行多伦多述情障碍量表（TAS-20）、手机成瘾 量表（MPAI）和错失恐惧量表（FoMOs）问卷测试；对数据采用SPSS 26.0进行描述性统计、Pearson相关分析， 采用PROCESS 3.5检验中介作用。结果：述情障碍、手机成瘾和错失恐惧量表的总分分别为（58.24±12.62） 分、(46.90±13.54）分、（22.81±6.95）分。Pearson 相关分析表明，述情障碍与手机成瘾呈正相关（r=0.69，P＜ 0.01），与错失恐惧呈正相关（r=0.66，P＜0.01），错失恐惧与手机成瘾呈正相关（r=0.70，P＜0.01）。中介效应 检验表明，在控制性别的影响后，述情障碍对手机成瘾的直接预测作用显著（β=0.73，P＜0.01）；错失恐惧在 述情障碍和手机成瘾的关系中起部分中介作用（效应值=0.31，95%CI 0.231～0.354），中介效应占总效应的 42%。结论：述情障碍不仅可以直接影响手机成瘾，也可以通过错失恐惧的中介作用间接影响手机成瘾。

To explore the mediating effect of fear of missing out on the relationship between alexithymia and mobile phone addiction. Methods: A cluster random sampling method was employed to select 554 college students from four colleges and universities in Wuhan, Hubei Province, China, between April and May 2022. The participants completed the Toronto Alexithymia Scale-20 (TAS-20), the Mobile Phone Addiction Index (MPAI), and the Fear of Missing Out Scale (FoMOs). Descriptive statistics and Pearson’s correlations were computed using SPSS 26.0, and the intermediary effect was examined using PROCESS 3.5. Results: The total scores for alexithymia, mobile phone addiction, and fear of missing out were (58.24±12.62), (46.90±13.54), and (22.81±6.95), respectively. Pearson’s correlation analysis revealed that alexithymia was positively correlated with mobile phone addiction (r=0.69, P<0.01), fear of missing out (r=0.66, P<0.01), and fear of missing out was positively correlated with mobile phone addiction (r=0.70, P<0.01). The mediation analysis, controlling for the effect of sex, showed that alexithymia had a significant direct predictive effect on mobile phone addiction (β= 0.73, P<0.01). Furthermore, fear of missing out partially mediated the relationship between alexithymia and mobile phone addiction (effect size=0.31, 95% CI 0.231～0.354), accounting for 42% of the total effect. Conclusion: Alexithymia contributes to mobile phone addiction directly, as well as indirectly through the mediating effect of fear of missing out.