Abstract: This paper has established the continuity dynamic model of crowd evacuation and presented the results of study on simulating the crowd evacuation behavior in the building based on human behavior characteristic.Formulas of the self-driven forces,the interaction forces with other pedestrians and the corresponding interaction forces with the wall have been deduced.In addition,the seismic forces in the building have been quantified in different earthquake intensities.In this research,the VB programming has been used to analyze the simulated example under different seismic intensities.It has been found that the self-driven forces are linear with the increase of earthquake intensity and velocity.Nevertheless,the variation of the interaction forces which follows the miles of space and pedestrian velocity increases at first,then decreases and tends to approach zero subsequently.What's more,the factor of people in the evacuation bearing earthquake force has been associated with seismic intensity,that is,the greater intensity,the greater force.Finally,this study also has discussed the changing pattern of the resultant force in the process of evacuation.Conclusively,this new model can simulate the crowd evacuation behavior in earthquake in a lifelike way,and it also gives theoretical foundation to guide evacuation when the earthquake happens.