Abstract:In recent years, a series of destructive earthquakes, which posed a great threat to people's properties and lives,have seriously affected the rapid development of our economic society. With the thorough implementation of Law of the People's Republic of China on Protecting A-gainst and Mitigating Earthquake Disasters and high attention on earthquake preparedness and disaster mitigation of the community, the awareness of earthquake defense and disaster reduction and ability of self-aid and mutual-aid have been significantly enhanced in our society. But lots of shock cases and rumors about earthquake have showed that social propaganda of earthquake preparedness and disaster reduction is not enough, and the public's awareness of earthquake prediction and degree of science popularization are still insufficient. Therefore, to publicize and promote the knowledge about earthquake preparedness and disaster reduction will still be one of main problems that restrict the rapid development of earthquake preparedness and disaster reduction in a long term. Public Service Advertising (PSA) which efficiently guides the development of public welfare causes great response in the society and is always supported by the whole society. Therefore, how to establish effective propaganda model of PSA is a question worthy of further exploration. This article tried to give some suggestions on the propaganda model of PSA through analy-sis, summary and research on laws, regulations and policies of PSA.