Currently,the developed early-warning system on crowd stampede in public site were mostly based on population flow and density,but failed in developing the system from whole process of accident.This paper re-views the mechanism of stampede and proposes an early-warning system which orientated to the high density crowd stampede.The system is consisting of risk supervision,risk assessment and warning/disposition functions.The concept of this kind of system would be beneficial to emergency level and ability of police agencies in responding huge social events.%目前关于公共环境下的密集人群踩踏事故预警更多的是从人群的流量和密集度等特征的识别来进行风险的预警，缺乏对事故整体的系统性考虑。本文基于密集人群聚集踩踏事故的机理，建立了基于人群风险监测、风险分析、风险预警／处置等技术手段的密集人群踩踏事故预警系统。该系统的构建将有利于提高公安部门大型活动的应急能力与水平。
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