With the Baidu index data sharing platform, the paper carries out statistical analysis on the attention of users relevant to healthy public opinion, and conducts empirical study on the lifecycle of healthy public opinion at a macro level. Through the analysis on the data of forwarding microblogs relevant to healthy public opinions from Sina Website,it discusses the lifecycle of healthy public opinion at a micro level.It also introduces the long tail effect of half-life period and lifecycle of healthy public opinion, and analyzes the lifecycle-based healthy public opinion intervention countermeasures.