Abstract: To solve the urban personnel emergency evacuation strategy caused by major emergencies such as earthquakes, setting emergency evacuation rally points, a multi-criteria model based on space interchange mechanism is proposed. Considering the uneven spatial distribution of urban population, the model distributes the rally points for the pre disaster-affected population by taking the form of space units. At the same time, taking into account of the factors including design capacity of each point, exclusive distribution, service range and pre affected staff travel, the model will ensure that the design capacity of each point is not overrun, the total travel of all evacuees is minimum, and the service range of each point is spatially continuous as far as possible. Which will provide city emergency evacuation a scientific basis for decision making.