Abstract：A fuzzy mathematics model and the AHP comprehensive method named fuzzy hierarchy comprehensive evaluation method is applied to evaluate the degree of city safety from both qualitative and quantitative aspects. A city public-safety-evaluation-index system is established. The results show that the safety level of Pingdingshan city is very safe,and that there are main factors affecting the safety such as the security level of urban lifeline,natural disasters and emergencies,and the secondary indicators of food safety. The meteorological disasters and industrial accidents are most serious safety factors in an urban city.

Keyword：urban safety;index system;fuzzy comprehensive evaluation;analytic hierarchy process;