新媒体时代,以微博为首的新媒体平台越来越成为突发事件、热点事件的重要集中发源地。正是由于微博的发布门槛低、监管体制弱、传播速度快的特点,在突发事件的微博信息传播中时常会出现从众现象,即传播学范畴里的“乐队花车效应”。本文列举上海外滩踩踏和昆明火车站暴恐案两大典型事件,并进行对比分析。 In the era of new media, the new media platform headed by Weibo has increasingly become an important center of birth for emergencies and hot events. It is precisely because of the low threshold of the publication of micro-Bo, the weak regulatory system, the characteristics of the spread of fast, often in the dissemination of microblogging information on the public phenomenon, that is, the field of communication “band floats effect.” This article lists two typical events such as stampede on Shanghai’s Bund and violent terrorist attack at Kunming Railway Station, and makes a comparative analysis.