Abstract: Currently, some major group stampede incidents were caused by group self-organized behaviors. In this paper, Shanghai "12.31" stampede incident is analyzed to find that there are three typical features to this kind of incident, namely includes specific targets, fast congestion, and complex composition of group. The evolutionary mechanism of group self-organized congestion disaster is analyzed and prevention strategies are proposed. In the end, several major suggestions on further theoretical study to group self-organized disaster are presented.