The invention discloses an automobile axle device for a quick-detachable tire on an automobile. The automobile axle device for the quick-detachable tire on the automobile comprises an axle body; and wheel bearing mechanisms convenient to detach are arranged at the two ends of the axle body. The automobile axle device for the quick-detachable tire on the automobile has the advantageous effects thatthe mounting is more convenient, the detaching is more convenient, the fixing effect is good, drifting is prevented during the rotation of a wheel, and the connection between vehicle frames is more stable.