对网络舆情传播模式中单关键点型、多关键点型、链式型传播模式进行分析，对网络结构中的强势节点和桥节点的作用进行了讨论。针对不同主题的微博信息传播进行了实证分析，发现单关键点型传播模式以强势节点为主，没有桥节点支持，传播链一般较短，但传播速度快；多关键点型传播中多个强势节点通过桥节点进行信息交互，传播影响大；链式型传播模式由于缺乏强势节点，信息传播扩散能力较弱，但传播层次较深。%This paper not only analyzes the typical modes of network public opinion propagation, such as single key node, multiple key nodes and chain propagation modes, but also discusses the role of powerful and bridge nodes as well. According to an empirical research on microblog information dissemination of different themes, we find that single key node mode has a short propagation chain with fast in-formation dissemination though the support of bridge nodes is missing;multiple key nodes mode obviously includes powerful nodes, which facilitates the information exchange via the bridge nodes;while chain propagation mode has a relatively small range of dissemination for the lack of powerful nodes, but present a long propagation path.
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