本文选取“工业明胶”事件中的新浪微博为研究对象,对食品安全事件中微博舆论的竞争性特征进行验证和分析。研究发现,不同微博主体在食品安全事件中的参与形态和态度表达和关系互动都存在着竞争性趋势,这种趋势对于食品安全事件的发展和解决具有多种影响。特别值得关注的是,草根群体逐渐成为微博舆论最重要的建构者和传播者,也是勾连各舆论主体互动关系的关键因素。 This article selects “Sina Weibo” in “Gelatin Industry” as the research object, and verifies and analyzes the competitive characteristics of Weibo media in the event of food safety. The research found that there exists a competitive trend in the participation and attitude of different microbloggers in food safety incidents, and this trend has a variety of impacts on the development and solution of food safety incidents. What deserves special attention is that grassroots groups have gradually become the most important constructor and communicator in the public opinion of microblogging, as well as the key factor linking the mutual relations among the main body of public opinion.