The stator winding inter-turn short circuit fault is one of the most common faults of permanent magnet synchronous motor (PMSM). This fault will cause unbalanced three-phase currents, leading to violent fluctuation of output torque and decreasing the output capacity. When the fault is serious, excessive short-circuit current will burn the winding. In order to solve the above problems caused by inter-turn short circuit faults, a PMSM with automatic inter-turn short circuit fault tolerance has been proposed. A detection method for inter-turn short circuit fault location is proposed for this special motor. The special structure of the motor is introduced, and then the method of judging the phase of the fault coil by the characteristics of the magnetic leakage circuit and the original stator coil is deduced through the mathematical model. Finally, the finite element model of the motor is established by ANSYS software, and the simulation of different inter-turn short circuit cases of the motor verifies the correctness of the detection method.