Abstract:Presently,the research on microblogging is mainly focused on non-power fields such as film and television,and research on power industry is relatively limited.Therefore,based on the research of the field of film and television,according to the characteristics of the power industry,after the pretreatment of the comment,the relationship tree is set up,and by using the dynamically extended emotional dictionary and based on support vector machine method,the emotional polarity discrimination rules are established to carry out emotional polarity analysis.After experimentally verifying and generating the relationship between the tree,the extended emotional dictionary and the support vector machine improve the correctness rate of the two methods in the power field.