When open circuit failure occurs in single-Phase or multiphase of the six-phase permanent magnet fault tolerant motor, if the current flows of the remained phases are not adjusted, the torque ripple will be too large and the performance of the motor will be obviously reduced. In this paper, assuming that phase A is at fault, in order to preserve the performance of order, the mathematic model under five-phase stationary coordinate is set up. By performing dummy coordinator transformation for it, the decoupling control of the fault motor is realized, and vector control of it is possible. The simulation model is also set up and the simulation result indicates that, by changing the value and phase of the current flows of the remained phases, the motor can still operate in a normal way and preserve its performance in a normal state, therefore, the fault tolerant control of the motor comes true.