The dynamic model of joint interfaces characterized by the number of spring-damping elements is linear and cannot reflect the hysteresis nonlinear characteristics of joint interfaces with stick-slip and separation-slap at the joint interfaces. Proposed that joints dynamic characteristics can be equivalented to Bouc-Wen model in this paper. Then, the range of parameters in the model was restricted and sensitivity analysis was conducted for each parameters. Finally, the parameters of the Bouc-Wen model was identified by the least square method in different force cotrolled and displacement cotrolled, the identified results from the force controlled and the displacement controlled are compared, and differen noise effect are also analysis. From the results of simulation, results show that better identication results can be obtained from the displacement controlled than from the force controlled, and the signals are noise corrupted less 5%, the identification results from two different ways are only slightly different from the true values.