A FMS (flexible manufacturing system)scheduling algorithm based on an evolution algorithm (EA) is developed by intensively analyzing and researching the scheduling method in this paper.Many factors related to FMS scheduling are considered sufficiently.New explanations for a common kind of the encoding model are given.The rationality of encoding model is ensured by designing a set of new encoding methods,while the simulation experiment is performed.The results show that a FMS scheduling optimum problem with multi-constraint conditions can be effectively solved by a FMS scheduling simulation model based on EA.Compating this method with others,this algorithm has the advantage of good stability and quick convergence. A FMS (flexible manufacturing system) scheduling algorithm based on an evolution algorithm (EA) is developed by intensively analyzing and researching the scheduling method in this paper. Many factors related to FMS scheduling are considered sufficiently. New explanations for a common kind of the encoding model are given. The rationality of encoding model is ensured by designing a set of new encoding methods, while the simulation experiment is performed. The results show that a FMS scheduling optimum problem with multi-constraint conditions can be satisified solved by a FMS scheduling simulation model based on EA.Compating this method with others, this algorithm has the advantage of good stability and quick convergence.