In order to solve the problem that it is difficult to choose the parameters of the regulator for lag compensation of velocity and acceleration during the design of turret servo system, a method to confirm the parameters of the regulator is proposed. According to lag compensation principle, the model and its parameter range of the regulator are confirmed at first. And then, several groups of lag compensation parameters keeping the stability of the system are obtained through the method of exhaustion. Then M-file is written by MATLAB with the feature of simulink simulation parameters being modified on-line. The best group of parameter is determined through calculating one by one the tracking accuracy corresponding to each group of parameter. The tracking accuracy of the turret choosing the best group of parameter is proved finally. Experimental results show that the tracking accuracy of the turret using the lag compensation regulator with new design method is 14.39” and the accuracy requirement of the system is met completely.