Oil pump for vehicle and vehicle with same

The utility model discloses an oil pump for a vehicle and the vehicle with the oil pump. The oil pump comprises an oil pump shell, a driving shaft and an output shaft. A speed change mechanism cavityand an oil pump cavity which are arranged side by side are formed in the oil pump shell. The driving shaft and the output shaft stretch across the speed change mechanism cavity and the oil pump cavity, and the rotating axis of the driving shaft is parallel to the rotating axis of the output shaft; wherein a first driving gear and a second driving gear with different tooth numbers are arranged on the driving shaft; a first transmission gear and a second transmission gear with different tooth numbers are arranged on the output shaft; the first transmission gear and the second transmission gear can move in the axial direction of the output shaft, the first transmission gear is suitable for being meshed and matched with the first driving gear, and the second transmission gear is suitable for being meshed with the seco