Abstract: People are individuals with independent behavior in society, and have important influence on the occurrence and development of public opinion emergencies. At the same time, the group composed of individuals is the disaster-bearing body of public opinion events. Therefore, the use of simulation modeling means to explore the occurrence and development of public opinion Mechanism, for the public opinion emergency response measures to provide decision support, the individual behavior of the modeling simulation is particularly important. Based on the analysis of the psychological behavior process of individual information processing, a complete mechanism model was put forward which could reflect the process of individual psychological behavior and the corresponding reduction model, and studied the theory and method of multi-source data association and integration, based on the actual data, the individual model of the realization and parameter analysis were completed.

Key words: public opinion simulation, character modeling, psychological behavior, mechanism model