According to the monitoring data under fenced condition in typical grassland of Inner Mongolia from1983to1993,a cellular automation model is established to discuss the typical steppe grassland community succession.The computer simulation result is close to the dynamic tendency of actual community restoration succession,so the hypothesis that proposed for estab-lishing the model proves to be correct.Furthermore the grassland degenerated procedure can al-so be simulated using this model,and the cognition to the degenerated grassland and re storation procedures is also deepened.