Abstract: Ideological security means that the mainstream ideology of the country can adapt to the development requirements of the economic base, maintain a relatively stable structure, play a normal function, effectively resist internal and external heterogeneous ideology factors' erosion, destruction or subversion, ensure that the country's mainstream ideology can be widely recognized at home and abroad. The ideological security includes four aspects:the security of guiding ideology, the security of political belief, the security of moral order and the safety of national spirit. The ideological security has the characteristics of four aspects:fundamental, prediction, concealment, variability and so on. For the maintenance of national security in the new era, scientific analysis of the relationship between political security, economic security, cultural security and social security is of great significance.