The invention discloses a power drive system and a vehicle, including a first motor, a first clutch, a second clutch, a third clutch, a first input shaft, a second input shaft, a third input shaft, an output shaft, a first gear set, The second gear set and the third gear set, the first motor is connected with the first input shaft, the second input shaft and the third input shaft respectively through the first clutch, the second clutch and the third clutch, the first input shaft, the second The input shaft and the third input shaft are connected to the output shaft through the first gear set, the second gear set and the third gear set respectively. The first gear set, the second gear set and the third gear set correspond to three speed ratios. Switching the first clutch, the second clutch and the third clutch can realize the three-speed shifting of the first motor, which can meet different driving force requirements. Improve the vehicle economy; the structure is simple and compact, the number of parts used is less, the energy transmission loss is less, and the system efficiency is improved.