以北京市“7.21”特大自然灾害军地联合应急活动为研究对象,运用EPC方法对预警和信息报告活动进行建模和仿真研究;通过对仿真结果分析,认为存在问题的症结在于目前北京市军地联合应急机构不健全;在重新构建北京市军地联合应急领导小组的前提下,对其进行优化建模和仿真. Taking the joint emergency activities of the “7.21 ” natural disasters in Beijing city as the research object, the EPC method was used to model and simulate the warning and information reporting activities. According to the simulation results, the crux of the existing problems lies in the current Beijing The joint military and municipal emergency response agencies are not sound; under the premise of rebuilding the leading group of the joint military and municipal emergency forces in Beijing, they are optimally modeled and simulated.