The parameters affecting the electromagnetic force of a novel electromagnetic actuator are various, and influence mechanisms of them are still not clear. To solve this problem, the simulation calculation model of this electromagnetic actuator is worked out with the software ANSYS, and the electromagnetic force of processed prototype is measured by experiment. The precision of the simulation model is verified by comparing the experiment and simulation results, and the maximum deviation of electromagnetic force is 11.6%. According to the simulation model, the influence rules of several parameters to electromagnetic force are deeply analyzed, including tooth height, coil turns, tooth number, air gap, armature thickness and yoke thickness, and the influence mechanisms are disclosed. These results lay the foundation for further optimization of this electromagnetic actuator, and are helpful to the design of other similar electromagnetic actuators.