Car and automatic adjustment control system used for adjusting position of safety belt of car

The utility model relates to a car and an automatic adjustment control system used for adjusting a position of a safety belt of the car. The automatic adjustment control system comprises a safety belt bracket, a power device, a car door switch sensor, a seat pressure sensor and a vehicle control diagnosis device, wherein the safety belt bracket is arranged inside the driving cab of the car, associated with a portion of the safety belt and provided with a first position and at least a second position; the safety belt bracket at the first position is in a natural state and drives the portion of the safety belt to move to the second position under the action of an outer force so as to enable the portion of the safety belt to be closer to a driver and to be contacted, with respect to the first position, or drives the portion of the safety belt to return from the second position to the first position; the power device is connected to the safety belt bracket and is used for providing the outer force; the vehicle co