Emergency evacuation has become an important subject in the safety field .Cellular automata can be used for simulating complex phenomena .This paper sets up a crowd evacuation model based on the principle of cellular automat , and determines the cellular space and state of each cell .According to the actual situation , the pa-per improves and optimizes cellular evolution rule , and develops an evacuation program to simulate the crowed e-vacuation process , and gets the basic rule and evacuation time .Simulation results show that the reality and reasona -bly for the proposed model to simulate the case of an emergency evacuation process .%元胞自动机可以对复杂现象进行模拟，利用二维元胞自动机的理论建立人群疏散模型，确定元胞空间和元胞状态，根据实际情况改进和优化元胞演化规则，编写了疏散过程的程序对突发事件下人群疏散进行模拟，获得了人群疏散的基本规律及疏散时间。研究结果表明，该模型能更加真实、合理地模拟出紧急情况下的人群疏散过程。
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