【Purpose/significance】It has become a trend for netizens to use mobile terminal technical tools to participate in public opinion dissemination. How to make full use of advanced mobile communication technology and internet technology to effectively strengthen the public opinion management of micro-blog under the mobile terminal environment is an important task for the government and micro-blog platform.【Method/process】Based on social network theory, taking Sina micro-blog hottopic "Football World Cup" as an example, this paper uses programming method to connect the Sina API open platform to obtain data, usesGephi to visualize, analyzes the network public opinion under the mobile terminal environment.【Result/conclusion】The conclusion reveals the mechanism, rules and network structure of micro-blog public opinion dissemination under the mobile terminal environment, which can make the control subjects have a better understanding of micro-blog public opinion dissemination. On this basis, it provides guidance for the legal regulation and system construction of public opinion management, and provides guidance for the cultivation of micro-blog users’ cultural ethics.