With the aim to model the hysteretic curve between the output displacement and applied voltage of the WTYD type piezoceramic micro-actuators, the Bouc-Wen model to characterize the hysteretic relationship between the output displacement and applied voltage of the piezoceramic micro-actuators is put forward by using the Bouc-Wen hysteretic operator to simulate the hysteretic component and then a corresponding parameter identification method is established. To evaluate the effectiveness of the developed model and the parameter identification method, the corresponding experimental setup is established and the model is validated. Research results indicate that the maximal absolute and relative errors of the proposed Bouc-Wen model are less than 3.78 μm and 5.79% respectively, which shows the proposed Bouc-Wen model and the parameter identification method can well simulate the hysteretic characteristics of the WTYD type piezoceramic micro-actuators.