城市建设所依托的地质、地理环境 ,无论是原生环境还是人类开发活动剧烈干扰导致的次生环境问题 ,地质灾害总是扮演着特别重要的角色。地质灾害在原生及后期诱发条件下的表现 ,成为城市工程地质环境评价时必须十分注重的环境行为之一。城市防灾规划以地质灾害的防治为目的 ,因其评价目标的重要性 ,规定了它在城市工程地质环境评价与分析中的特殊重要性 The geological and geographical environment on which the urban construction relies, and the secondary environmental problems caused by the violent interference of the primary environment and human development activities, the geological disasters always play an especially important role. The performance of geological disasters under the condition of primary and late evacuation has become one of the environmental behaviors that must be paid great attention to when evaluating urban engineering geological environment. For the purpose of prevention and treatment of geological disasters, urban disaster prevention planning stipulates its special importance in the evaluation and analysis of urban engineering geological environment because of the importance of its evaluation objectives