In order to solve problems of hard to implement, complex method of parameter identification in the Bouc-Wen model of magnetorheological dampers (MRD), a Bouc-Wen dynamic model of MRD is built in Simulink and its parameters are obtained by using Simulink Design Optimization tool based on mechanical characteristic experiments of a MR damper. The parameters of Bouc-Wen model were identified. In combination with the physical significance of each parameter to analyze the result of identification, and to determine the controlled damping parameters (CDP), functional relationships between some parameters and applied current were determined by using the method of linear fitting. Finally built in considering CDP Bouc-Wen simulation model, made simulation with experiment data in different amplitudes and frequencies, the simulation results were compared with experimental values. It is shown that the simulation results are consistent with the test results, and the model identified can meet the need of parameters in engineering applications.