The angular acceleration vibration of the stabilized platform is one of the important error sources for superconducting angular accelerometer differential structure in dynamic environments, and the common-mode rejection ratio (CMRR) of the system determines the ability to suppress this error. In order to calculate CMRR of the system, the relationship between the measurement circuit output and angular displacement was calculated first. Then, the rotation of the rotating mass was analyzed in the frequency domain and the common-mode and differential-mode transfer functions of the system were derived. Finally, the mismatch between the two angular accelerometers during fabrication and assembly and the process of adjusting the ratio of persistent currents were considered. Furthermore, we established a corresponding Simulink model. The simulation results are consistent with the analytical results, and the CMRR of this structure can reach 5265.2.