Steering oil tank device, steering system and vehicle

According to the steering oil tank device, the steering system and the vehicle, a tank body with an opening and a tank cover connected with the tank body jointly form a main body structure of the steering oil tank device, steering hydraulic oil is located in the tank body, the tank cover is connected to the tank body, the opening is covered with a cover body, and due to the existence of a first hole, the steering hydraulic oil is more stable. The tank body is communicated with the external environment through the first open hole and the drainage channel, the working condition of air pressure balance is met, the waterproof breathable film sealing the first open hole allows air to enter and exit normally, water mist, liquid drops and other moisture in the air of the external environment are blocked, the accumulated moisture can be drained out of the tank cover, and the purpose that after a vehicle is used for a long time, the vehicle cannot be damaged is achieved. The steering hydraulic oil is not easy to deter