Community is an important foundation and platform for the prevention and control of social security，and it is an important part of the social security prevention and control network. The majority of the public are living in the community. How is the community’s public security prevention and control system？This is directly related to the general public’s personal property security and the general public’s sense of security，reflecting the effect of social security prevention and control system. In a street office area of Beijing from 2013 to October 2016 the community prevent the cases as the object，the weak link characteristics，analysis of the community can prevent the incidence of cases of community crime prevention and control and the existing problems，and put forward improvement ideas and suggestions of the construction of community public security prevention and control system.