At present，Weibo and WeChat，as important new media platforms for the voice，development and communication of public opinion in China，play a crucial role in the communication of public opinion. Based on the example analysis of the key public opinion events in 2018 selected by big data statistics and questionnaire survey，including the number of comments，the amount of articles read and shared in Weibo and WeChat official accounts，this paper analyzes and discusses the characteristics and communication of public opinion modes presented by the two different new media platforms，WeChat official accounts and Weibo. By comparing the public opinion platform of Toutiao，the significance of “positive energy information pool” and “algorithm recommendation” for actively guiding public opinion is analyzed.