By March 2020, the number of Internet users in China had reached 920 million, among which the number of users of WeChat public platform accounted for more than half, including men, women and children, and its information disSEMination scope gradually expanded and its influence continued to increase. Because of its great influence, it is easy for people with ulterior motives to use WeChat platform to spread rumors, violence, terror, fraud, pornography and other illegal information to the public, causing a sudden crisis of public opinion. All these threaten the Internet order and public interests, and even endanger the image of the government and national security. So how to avoid the influence of WeChat public opinion communication, and how to use the public opinion monitoring system, it is best to use WeChat public opinion monitoring, and learn from the network as much as possible.