摘要：[目的/意义］在社交媒体“时间消解”的情境下，针对微信朋友圈推出的限时动态设置功能，探究用户使用该设置的影响因素，为社交平台相关设置的学术研究及实践开发提供参考依据。［方法/过程］基于扎根理论方法，通过半结构化访谈方式收集了30位受访者的资料，通过开放式编码、主轴编码及选择性编码，对影响用户使用限时动态设置的因素进行归纳与分析。［结果/结论］社交媒体上相关的历史信息因素（如信息敏感度）会影响用户的使用动机（如社交动机），进而影响其对限时动态设置的使用。同时，用户的使用动机还会通过使用限时动态设置所获得的益处（如印象管理）和成本（如自我呈现阻碍），间接的影响其对该设置的使用。另外，个体因素及情境因素对上述相关关系起到一定的调节作用。

Abstract：[Purpose/significance] Exploring the factors of using the time limit dynamic setting launched by WeChatMoments, and provide theoretical and practical suggestions for researchers and practitioners regarding settings on social media platforms, under the context of“time collapse”in social media. [Method/process] We conducted semistructuredinterviews to collect data from 30 respondents, by open coding, axial coding and selective coding, based ongrounded theory. Then, we summarized and analyzed the data to explore what factors influencing individuals’uses ofthe time limit dynamic setting. [Result/conclusion] The results show that historical information factors (e.g., inforamtion sensitivity) on social media impact use motivations (e.g., social motivation), and in turn influence the use of timelimit dynamic setting. Meanwhile, use motivations would affect the use of time limit dynamic setting through benefits ofusing settings (e.g., impression management) and costs of using settings (e.g., selfpresentation barrier). Additionaly, individual factors and situational factors could moderate relevant relationships which we mentioned above.