The calibration accuracy of inertial device is determined by the dynamic characteristic of inertial simulation turntable. By setting up the swing amplitude and frequency of the three turning frameworks in the inertial simulation turntable, the method for obtaining the theory and practical output of angular position, angular rate and acceleration of each turning framework under independent swing is studied, and the error curve between theory and practice is calculated. The turntable testing results show that the dynamic error characteristic of three axis inertial simulation turntable can be obtained by the proposed testing method and the high frequency dither noise is the main factor of influencing the calibration accuracy of inertial device.