Abstract: The research into the XSJ-2 small power servo system was conducted.First,the experimental modeling to the servo system was carried out;Then the system diagram of the system was constructed;the system was simulated with the Matlab language programming;The step responses of system was obtained under the different values of K;Finally,a series corrector for the system was designed with an experimental way to make the system dynamic target meet the requirement.Its methods for modeling,simulation and the corrector designing are easy and feasible and may have certain reference functions for the research of other servo-control system research.