The invention discloses an impact resistant air-bearing motorized spindle which comprises a machine body component, an axle core component and a lower air bearing component, wherein the axle core component is arranged in and sleeved with the lower air bearing component; the lower air bearing component comprises at least one wear-resisting bearing plate and a bearing seat; a sinking groove is formed in the surface of the axle core component; a coating layer is embedded in the sinking groove to prevent the axle core component from abrasion; the bearing seat is fixedly connected with the machine body component; the at least one wear-resisting bearing plate is fixed on the bearing seat and at the position between the bearing seat and the axle core component. According to the impact resistant air-bearing motorized spindle, provided by the invention, the sinking groove is formed in the surface of the axle core component, the coating layer is embedded in the sinking groove to prevent the axle core component from abrasion, and the wear-resisting bearing plates are fixed on the bearing seat and at positions between the bearing seat and the axle core component, so that the stuck fault probability of the spindle can be reduced remarkably.