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Sudden natural disasters and public security incidents are emerging one after another. Scholars and governments are increasingly concerned about the issues of urban public security. This paper analyzes the high-cited literature on 261 urban security-related topics in Web of Science in the form of knowledge maps. We found that the United States and China have the strongest research on such issues as health, disease prevention and control, pollution, residential environment issues, agriculture and food issues etc. Among them issues related to new technologies are hotspots in urban security research.