Comprehensive evaluation of geological environment is important to urban environmental management and urban planning.Based on the systematic analysis of the chief factors influencing the urban geological environment in Xianyang City and the combined information diffusion with fuzzy integrated evaluation

a comprehensive evaluation model of geological environment was constructed

and then urban geological environment in Xianyang City was comprehensively evaluated.The evaluation model was propounded for regional geological environment by considering the effects of surrounding cells.In the model

the analytic hierarchy process(AHP) was used to found the influence factor weight.The fuzzy integrated evaluation was adopted to determine the effects of various factors on geological environment.