The invention provides an incoming passenger travel characteristic proportion determination method under a rail transit emergency event; the method can quantify the travel characteristics, thus improving result accuracy; the method comprises the following steps: building a virtual rail transit network when the rail transit emergency event happens; obtaining an effectively path set between the rail transit emergency event station and a destination station according to the virtual rail transit network; screening the effective paths in the effectively path set, obtaining an effectively path set and each path selection proportions of the passengers under the rail transit emergency event according to the screening, thus obtaining the passenger travel characteristic proportion between the rail transit emergency event station and the destination station; calculating the passenger travel characteristic proportions between the rail transit emergency event station and all destination stations, combining with the incoming amount and OD proportion distribution of the emergency event station in a simulation time period under normal conditions, thus obtaining the incoming passenger travel characteristic proportion of the emergency event station. The incoming passenger travel characteristic proportion determination method is suitable for rail transit technical field.