Abstract: Urban-village security problem is the major difficulty for urban governance. As the reconstruction of urban-village can't be accomplished in one-time action, urban-village security problems will exist over a period of time. Based on public service theory and system management thought, in the introduction of the modeling language SysML, this paper analyzes the demands of urban-village security systematically, refins public security administration mechanism of urban-village, and builds the SysML model of urban-village security administration consisting of psychological adjustment subsystem, security prevention and control subsystem, early warning system, interactive response system, and recovery subsystem. Also, it finds out problems in existing security administration systems compared with the ideal model and proposes solutions and strategies.