Power transmission system and vehicle

The invention relates to a power transmission system and a vehicle, relates to the field of automobiles, and solves the technical problems of low precision of an output shaft and easy generation of errors in related technologies. The power transmission system comprises a motor and a speed reducer. The motor is provided with an output shaft which is provided with a first end. The speed reducer is provided with an input gear which is arranged at the first end. The input gear and the output shaft are coaxially arranged, and the input gear and the output shaft are integrally formed. The input gear of the speed reducer and the output shaft of the motor are integrally formed, the precision of the output shaft can be improved, errors are reduced, and the overall running performance of the motor becomes more stable and reliable. And meanwhile, a connecting structure between the input gear and the output shaft is omitted, so that the manufacturing cost is saved. 本申请涉及一种动力传动系统及车辆，涉及汽车领域，解决相关技术中输出轴精度不高、易产生误差的技术问题。本申请中的动