随着社会化媒体的崛起，微博成为社会热点事件的重要信息源、策源地和意见发酵池，对热点事件在微博的传播机制研究具有重要价值。本文选取近两年新浪微博中的21个热点事件，通过大数据挖掘和分析技术发现加V认证用户和男性是社会热点事件的议题设置和积极转发者，转发深度和转发宽度符合无标度和小世界现象，热门事件传播网络中的群集系数更高于其他话题，看似话语平权的背后是话语再集权，形成了新的话语权力新贵；热点事件的传播结构和事件自身的性质具有很大关联性，热点事件传播具有多信息源、多中心、多层和随机性等特点，要理性看待社会热点事件在微博传播中的谣言现象。

With the rise of social media, micro-blog has become an important source of information and
opinions for hot-events in China. It has high value in the research on communication mechanism of
hot-events in micro-blog. This paper selects 21 hot-events in Sina micro-blog in two years. By using
the data mining techniques, this paper finds that verified-users and men are setting the hot-events
issues and retweeting them; the depth and width of retweeting fits scale-free network and small-world
phenomenon; the clustering coefficient of hot-events is higher than other topics. The discourse-equality is
the discourse-recentralization in fact. This paper also finds the properties of communication structure has
great relevance with the hot-events themselves, and the communication structure of hot-events is multi sourced, multi-centered, multi-layered and random. In conclusion, we must have correct understanding
of the rumors in the hot-events in micro-blog.