Abstract: Water resources safety is the basis and premise of social and economic security and sustainable development. Under the increasingly urgent situation of water resources problem,it has become the focus of attention from all walks of life. The commonly used water resources security evaluation index is sorted out,and the basic index database of water resources security evaluation is established. Considering the connotation of water resources safety,four criteria are set up,including water supply guarantee,water resources development,water resources allocation and water resources utilization,then a comprehensive evaluation index system consisting of 11 evaluation factors is constructed.According to the data of natural,economic,social and water resources in Linyi City from 2013 to 2018,the comprehensive evaluation of water resources security in Linyi City is carried out by using the analytic hierarchy process. The results show that the overall level of water resources security in Linyi City is in a good state,but there is a certain demand for water resources security in water resources development and allocation.