The invention discloses an automobile gear structure which comprises a gear body and a plurality of teeth arranged on the outer circumference of the gear body. The gear body is provided with a central shaft hole, the outer surfaces of the teeth are provided with a composite wear-resisting coating which sequentially comprises a zirconium carbide wear-resisting coating, a tungsten carbide wear-resisting coating and an aluminium oxide wear-resisting coating from inside to outside, and a key groove is formed in the central shaft hole. The automobile gear structure is simple and reasonable, good in wear resistance and long in service life.