Public opinion has always played a role in reflecting public opinion and influencing people"s will. In the new situation of profound changes in the news public opinion ecology, all kinds of hostile forces are competing with us for the position of news and public opinion, and competing with us for the initiative and dominance of news public opinion guidance. The complexity of news public opinion and news public opinion is unprecedented. It is of great significance to grasp the time effect of news public opinion guidance in order to fight for the initiative of news public opinion guidance.