从微观角度分析焦炭沉积与固体粒子凝聚间的相似性 ,提出一种催化剂积炭失活的微观模型 ,并用 Monte-Carlo方法模拟计算 .结果表明 ,焦炭的沉积形状与沉积机理有很大关系 ,得到了催化剂活性随时间及积炭量的变化关系 .并且 ,此模型虽只有两个参数 ,模拟过程亦十分简单 ,但适用范围广 ,可模拟催化剂的制备过程 ,指导催化剂生产 . From the microscopic point of view, the similarity between coke deposition and solid particle agglomeration was analyzed and a micro-model of coke deactivation was proposed. The Monte-Carlo method was used to simulate the coke deposition. The results show that the coke deposit shape is closely related to the deposition mechanism, The relationship between the catalyst activity and the amount of coke deposition was obtained.Also, the model has only two parameters, the simulation process is very simple, but it has a wide range of application, which can simulate the catalyst preparation process and guide the catalyst production.