High-torque electric power steering system gear and automobile thereof

The utility model provides a high-torque electric power steering system gear and an automobile with the high-torque electric power steering system gear in the technical field of automobile parts, and the high-torque electric power steering system gear comprises a plastic part and a metal insert which are arranged in an embedded mode. The plastic part comprises a first tooth profile, a weight reduction groove, a reinforcing rib and a first shaft hole, the first tooth profile is fixedly arranged on the plastic part, the weight reduction groove is fixedly arranged on the plastic part, the reinforcing rib is fixedly arranged on the plastic part, and the first shaft hole is fixedly arranged on the plastic part. The metal insert comprises a second tooth profile, a step and a shaft hole, the second tooth profile is fixedly arranged on the metal insert, the step is fixedly arranged on the metal insert, and the shaft hole is fixedly arranged on the metal insert. By adopting the design structure that the polyether-ethe