Abstract: 【Purpose/significance】Clarify the concept boundary of information elaboration, analyze the characteristics of public opinion
information elaboration under the blockchain environment, deconstruct the blockchain public opinion information elaboration network,
promote the application of information elaboration theory, and provide enlightenments for public health emergency public opinion man? agement.【Method/process】Based on information elaboration and public opinion communication theory, this study proposes a concep? tual model of public opinion information elaboration in block chain environment, collecting steemit and Sina micro-blog COVID-19 data, and using social network analysis method to use Gephi tools to conduct empirical research.【Result/conclusion】The public opin? ion information elaboration network under the blockchain environment is scale free network, the user information elaboration level is high, and the information elaboration behavior is obvious based on the elaborate interpretation of information.【Innovation/limitation】The public opinion information elaboration model constructed in this paper expands the application of information elaboration theory in the field of public opinion management, and also has practical value for giving play to the bridge role of information elaboration be? tween public opinion information dissemination and knowledge innovation. However, it needs to be improved and expanded in terms of data collection scale, data annotation result test, information elaboration concept boundary and so on.