The invention discloses an emergency standby wheel vehicle. According to the emergency standby wheel vehicle, a vehicle head plate (8) is detachably connected to the first end of a folding bearing plate, a vehicle tail plate (6) and a guide plate (5) are detachably hinged to the second end of the folding bearing plate, and the first end and the second end are located on the opposite edges of the folding bearing plate. The folding baring plate comprises a first plate body (1), a second plate body (2), a telescopic baffle (3) and a fixing part (4). The end, away from the vehicle tail plate, of the first plate body is hinged to the end, away from the vehicle head plate, of the second plate body. The fixed end of the telescopic baffle is fixedly connected to the lower surface of the first plate body. The telescopic end of the telescopic baffle extends in the length direction and is fixed through the fixing part. Under the condition that the first plate body and the second plate body are in a horizontally opened state, the telescopic end of the telescopic baffle abuts against the lower surface of the second plate body and extends to the vehicle head plate. According to the emergency standby wheel vehicle, the size of the emergency standby wheel vehicle can be changed, and the emergency standby wheel vehicle is convenient to carry.