In this paper,the dissemination effect of cooperative information and exits choosing rules are introduced into social force model to exhibit the pedestrians behaviors during emergency evacuation,especially under the condition that most of evacuees are not familiar with the evacuation environment.In the develop social force model,a cooperative information diffusing strategies and the exit choosing rules are introduced to describe how the crowd obtain and choose appropriate direction,and a formula about estimation of exits evacuation capacity is also proposed.According to the simulation results,the exit choosing rules taking into distance,density and width of exit is very effective for the place with multiple exits of crowd evacuation,and the cooperative diffusing model can help more and more people obtain appropriate direction of movement.The simulation results also indicate another conclusion that crowd evacuation guidance at the beginning of time is very important.This work contributes to make an efficient emergency evacuation scheme for large public-gathering places.