China International Import Expo（CIIE）has been held for four sessions from 2018 to 2021. It cooperates with global exhibitors in an open and inclusive manner. However，as the COVID-19 epidemic continues to affect the global economy and the trend of anti globalization intensifies，the CIIE faces various public opinion pressures in media reports and social media. This report conducts research on the communication impact of this extraordinary event. It comprehensively uses big data theme modeling，social network analysis and emotional perception evaluation analysis methods to focus on the theme distribution，topic structure，reporting trend and emotional attitude of the past four CIIE（2018-2021）on international media institutions and social media（Twitter and Facebook）. The study found that in media reports and reports on social media platforms，European and American media organizations have become the main participants of overseas media. However，the number of countries that have cooperated closely with the CIIE to jointly build the “the Belt and Road” and the friendly and cooperative countries in central and Eastern Europe is limited. Since the third CIIE in 2020，the impact of COVID-19 on CIIE has become the focus of communication issues. Through semantic research，it is found that the five major aspects of intercountry cooperation，non-governmental business exchanges，exhibition transaction volume，cultural exchange and new technology display are the focus of the topic，which is the direction that needs to be focused in the future. At the end of this report，we propose to make the best use of the situation in emotional governance，so as to make the communication channels of the CIIE in the next stage more accessible，realize the combination of initiative and interaction，and establish benign communication logic and rules in the international media field.