Vehicle primary-secondary wheel and vehicle

The utility model discloses a vehicle child-mother wheel and vehicle, including mother wheel, guide rail, child wheel and drive device, the bottom of frame is provided with mother wheel and guide rail, the guide rail is located mother wheel side, the inside of guide rail is provided with arc groove, child wheel part extends into arc groove and can slide along arc groove reciprocating, child wheel is connected with mother wheel transmission through chain, and the drive device is connected with the drive device. The bottom of the frame is provided with a lifting device, and the lifting device is connected with the sub-wheel and used for driving the sub-wheel to slide in the arc-shaped groove so that the sub-wheel can make contact with and be separated from the ground; the child wheel is matched with the lifting device, the lifting device can be started after tire burst or air leakage of the mother wheel, the child wheel slides downwards along the arc-shaped groove to make contact with the ground, the mother whe