Fuel tank pressure stabilizing system and vehicle

The invention relates to an oil tank pressure stabilizing system and a vehicle. The oil tank pressure stabilizing system comprises an isolating valve, a pressure stabilizing valve and a pressure stabilizing valve, when the one-way valve is opened, the one-way valve is used for communicating the interior of the oil tank with the outside and ensuring that fluid flowing through the one-way valve flows unidirectionally; the oil tank pressure sensor is arranged in the oil tank and is used for detecting the internal pressure of the oil tank; the controller is used for controlling opening and closing of the isolating valve and the one-way valve to adjust the internal pressure of the oil tank after receiving the refueling application signal, and the controller is further used for receiving a signal of the oil tank pressure sensor and outputting a safety signal to open the oil tank conveniently after the pressure difference between the inside of the oil tank and the outside is within a safety range. According to the oil tank pressure stabilizing system, by arranging the one-way valve communicating the interior of the oil tank with the outside, outside gas enters the oil tank through the one-way valve, so that the time needed for adjusting the pressure difference between the interior and the exterior of the oil tank to a safe range is shortened, and the pressure stabilizing efficiency of the oil tank pressure stabilizing system is improved.