The present disclosure discloses a transversely-placed vehicle driving assembly, connected to a vehicle axle half shaft, wherein the vehicle driving assembly comprises a first power source and an automatic transmission, the automatic transmission is provided with a first input shaft therein, the first power source connects to the first input shaft, and a differential is provided at a joint of the automatic transmission and the vehicle axle half shaft; an intermediate shaft is provided parallel to the first input shaft; several gears are fixed or rotatably installed on the first input shaft, several gears are fixed or rotatably installed on the intermediate shaft, the gears on the first input shaft and the gears on the intermediate shaft are in engaged transmission in group, and the gears that engage with one another have different installing modes on the shafts; clutches are provided between the first input shaft and the gear that is rotatably installed thereon and between the intermediate shaft and the gear that is rotatably installed thereon; and engaging gear transmission is provided between the intermediate shaft and the differential. The present disclosure can realize transmission of two speed ratios, with flexible transmission modes, which shortens the axial size of the driving assembly, which cannot only satisfy the acceleration capability and climbing ability of the vehicle but also satisfy the demand on high vehicle speed.