Abstract: An apparatus for connecting an electric machine and a worm for an electric power steering system, including an electric machine, an electric machine shaft connected to the electric machine, and a worm. An end of the electric machine shaft is provided with a first mounting flange, and an end of the worm is provided with a second mounting flange. The apparatus includes at least one disk between the first mounting flange of the electric machine shaft and the second mounting flange of the worm. The apparatus for connecting an electric machine and a worm for an electric power steering system provided in the present invention is structurally simple, and at the same time transfers electric machine torque with high efficiency, and can effectively compensate for radial deviation and axial deviation between the electric machine shaft and a worm shaft.