AbstractsComplex system simulation has become the most important means to research complex systems.Firstly,developed course of complex systems was retrospected,and features of complex systems were summarized.Then,current development of complex system simulation was reviewed,and all kinds of modeling and simulation methods for complex systems were sorted described,and features of complex systems reflected by these methods were respectively summarized.It was proposed that it was of vital necessity to support research of complex systems with the aid of research results from other fields,and some methods promoting research of complex system simulation were introduced.Lastly,meaning of simulation for research of complex systems was expatiated.