Recently, small town community public safety problem has been increasingly highlighted, but its research is short on public safety carrying capacity. Through the investigation and study of community public safety carrying capacity, this paper analyzes the problem of community public safety in our country, to construct index evaluation system of public safety carrying capacity in small town community. DEA method is used to evaluate public safety carrying capacity in small town community, to provide scientific basis for the design of support and standardization theory about small town community in public safety planning.