The high-performance current loop is an important guarantee and basis for improving the performance of the permanent magnet synchronous motor servo system. In the control process, the current loop is usually susceptible to factors such as delay, sampling error so that it needs to have strong anti-disturbance capability. So an improved deadbeat current control algorithm with current correction is proposed. This method is based on the traditional deadbeat current control algorithm and improves the current sampling link. The current sampling value at time k and the current prediction value at time k are weighted to serve as a new current feedback value, and then deadbeat control is performed. In order to suppress the influence of sampling error on the current control, and then improve the anti-disturbance ability of the current in the steady state process. The simulation and experiments of a permanent magnet servo system prototype are carried out in Matlab to verify the correctness and effectiveness of the proposed method.