Based on the definitions of various steadystate and transient reactance parameters of synchronous motor, as well as the electromagnetic relationship between various reactance parameters and the windings, the magnetic circuit structure of the motor, a simulation calculation method based on the definition formulas of reactance parameters was proposed. The detailed simulation calculation steps were given. By comparing the calculated results with the measured results of the prototype, it was shown that the simulation results were in good agreement with the measured values, thus the validity and accuracy of the calculation method were verified.