新媒体的迅速崛起与广泛应用,对以传统媒体为主要媒介的传统危机治理与政策传播方式构成了挑战。本研究选取天津爆炸事件,对官微进行数据挖掘,并结合案例与社会网络分析的方法,阐述政府是如何应用社交媒体进行危机治理与政策传播的。研究发现不同类型危机信息传播呈现不同的特征,在传播过程中三大节点群体发挥了独特的作用。地方政府在政策解读等环节缺乏及时的政府回应,面临如何准确地对传播效果进行感知和评估等挑战。 The rapid rise and extensive application of new media poses challenges to the traditional crisis management and policy transmission modes that use traditional media as their main medium. In this study, we selected the explosion in Tianjin, conducted data mining on the micro-government, and combined with the case and social network analysis, elaborated on how the government applied social media to crisis management and policy dissemination. The study found that different types of crisis information display different characteristics, and the three major groups of nodes play a unique role in the process of communication. Local government lacks timely government response to policy interpretation and other challenges, and faces challenges such as how to accurately perceive and evaluate the effects of communication.