Abstract: Purpose/Significance Public opinion theme map can realize the formal description of the interrelationship among public opinion events nodes, and the construction of public opinion theme map is of great significance to effectively analyze and solve massive, heterogeneous and complex public opinion events in the era of big data. Design/Methodology The current research status, the theme map construction, and opinion regulation of social network the theme map in the era of big data are introduced in detail, and on the basis of the construction of the theme map of public opinion, the technical methods related to social network analysis are used as a means to dig out deeper knowledge associations and broader knowledge categories in the topic mapping, and to analyze the theme map from different dimensions such as key nodes, key paths, and trend models. Conclusions/Findings Finally, it explores the effective management and application value of social network public opinion theme map, and analyzes the scientificity, effectiveness and applicability of the practical application of social network public opinion theme map in economy, politics and life.