The dual-winding permanent magnet fault-tolerant motor(FTPMM) combines the advantage of the dual redundancy FTPMM and single FTPMM control system, this making the system more reliable less costly and improving the space utilization of the system. On the bases of analyzing the structure and mathematical model of the dual-winding FTPMM, the current vector fault-tolerant control strategy is proposed under healthy and faulty conditions. Combine the sliding mode observer(SMO) with the model reference adaptive system(MRAS), the basic equation of sliding mode surface in SMO-MRAS is constructed according to the differences between the actual current model and the adjustable current model. The SMO replaces the proportional-integral (PI) controller in the traditional MRAS to improve the accuracy and the function of Sigmoid replaces the traditional sign function to reduce chattering.