Abstract: Accurate understanding of the crime object of damaging public security is the vital premise to identify and check the crime of damaging public security. However, the property and content of public security have not paid sufficient and necessary attention in the theory field. The connotation of public security is explored, and some personal ideas are put forward in this paper. The public security is perceived as: non-specific or most people's security of life and health, the security of key public property, ...