Internal oil pressure pressurization system and vehicle

The utility model relates to the technical field of vehicles, and discloses a built-in oil pressure pressurization system and a vehicle, the built-in oil pressure pressurization system comprises a pressurization plunger, a first sleeve, an oil pan, a first oil path switching valve and a hydraulic cylinder; the pressurizing plunger is in sliding fit in the first sleeve in the axial direction, the pressurizing plunger and the bottom of the first sleeve respectively form a pressurizing chamber and a control chamber which are isolated from each other, the end, away from the bottom of the first sleeve, of the pressurizing plunger and the first sleeve define a low-pressure chamber, and the low-pressure chamber communicates with the low-pressure oil way; the hydraulic cylinder comprises a second sleeve and a driving part, the driving part is in sliding fit in the second sleeve, a first oil chamber is formed by the driving part and the bottom of the second sleeve, and a second oil chamber is defined by the end, away