For the case that owe rank may be caused in the multiple Parameters Identification of PMSM, a method that multiple parameters were identified individually using least square method was introduced. Then the resistance, inductance and flux linkage were identified based on recurrence least square (RLS) and hardware in the loop (HIL) platform. Finally , considering the great temperature influence, the resistance and flux linkage were identified. The method was verified that it could accurately identify the motor parameters.