Abstract: In order to quantitatively describe major public safety risks in metro and to elevate risk management level, major public safety incidents that have occurred in metro areas in recent years worldwide are counted, and characteristics of the incidents are analyzed from three dimensions: attack format, the time of incident, and the location of incident. Major public safety risk assessment indicator system for metro is constructed, and with the risk mitigation factor indicator as an example, the weight value of indicators at each level is obtained using the AHP (analytic hierarchy process). The results show that safe operation procedure, safety inspections and emergency response capabilities contribute prominently in preventing major public safety risks in metro. The indicator system is practical and is capable of objectively evaluating the overall risks faced in metro.