Abstract: Urban ecological security is the basis and premise to ensure the sustainable utilization of urban resources and regional sustainable development.Wanjiang City Belt has promoted the economic progress of the whole Anhui province, but ecological system which is crucial for social and economic has sustained various threats and oppression for years.In this paper, the ecological security evaluation index system of Wanjiang City Belt was constructed from four dimensions of driving-force,pressure,state and response,and we used entropy weight method and standard deviation coefficient method to determine the index weight. The comprehensive index method, the spatial variation model and the grey GM(1,1) modelwere used to analyze the characteristics of the dynamic spatial and temporal evolution and alsothe development trendof the ecological securityin Wanjiang City Belt from 2007 to 2018. Research results showed that:(1) The comprehensive index of ecological security in Wanjiang City Belt showed a fluctuating growth trend over time, but the improvement of each city was different. During the research period, the annual growth rate of the ecological security index in Hefei was the highest (1.14%), and that in Ma 'anshan was the lowest (0.77%). (2) Chizhou and Xuancheng in the south of the study area had high ecological security level, Chuzhou and Hefei in the north gradually transform to ideal security level, and Maanshan, Wuhu, Anqing and Tongling along the river in the middle were in poor ecological security level. (3) The evolution of ecological security pattern in Wanjiang City Belt had a certain continuity and regularity, and the characteristics of spatial differentiation level were significant. On the whole, it presented a spatial evolution pattern from "southern > northern > central " to "northern >southern > central". (4) The indicators of driving force and response layer had a good impact on ecological security. (5) The prediction results showed that the spatial distribution of ecological security center in Wanjiang City Belt will further change to the pattern of "southwest-northeast" during 2020-2030.