Inertial stabilized platform is used as a tool for stabilizing load, whose precision is mainly affected by the forced system vibration caused by environmental disturbance. Therefore, it is necessary to damp the forced system vibration based on vibration damper. Due to the drawback of the passive vibration reduction method, the active vibration reduction method is brought up in this paper, which essentially adds an active feedback link into the passive vibration damper to build the active vibration damper. According to choosing the appropriate algorithm to optimize the parameters of the active vibration damper, better performance can be achieved with smaller size. Simulation results show that the vibration reduction bandwidth can be widened by 5 times and the steady-state error of system forced vibration can be reduced by 6 times.