The characteristics of electrical machines such as electromagnetic, temperature rise, stress, and strain, etc.. are nonlinear and coupled, and it is impossible to replace them with simple mathematical models. The physical characteristics of the motor itself will affect the overall performance of the control system. The finite element model has the function of parameterization. Taking the permanent magnet synchronous motor as an example, the input stator slot number, rotor pole number, winding connection method, current value, and parameters of the main dimensions can be parameterized on the model, and the electromagnetic results such as air-gap flux density, armature winding flux linkage, electromagnetic torque, and winding voltage can be obtained under the two conditions of current no-load and load; the finite element-motion control system joint simulation model of the motor system based on COMSOL and Simulink is realized; dynamic loads can be added to the motor shaft; and the research includes transient and steady-state air-gap flux density, armature winding flux linkage, electromagnetic torque, winding voltage, current and other results.