The application of the invention discloses a self-adjusting tyre pressure monitoring system. The self-adjusting tyre pressure monitoring system comprises a plurality of pressure sensors, a plurality of rotating speed sensors, and a controller, wherein the pressure sensors are used for measuring the air pressure of each tyre of a vehicle and uploading the measured air pressure to the controller; the rotating speed sensors are used for measuring the rotating speed of each of the tyres of the vehicle and uploading the measured rotating speed to the controller; and the controller is used for receiving the air pressure of each of the tyres, the rotating speed of each of the tyres, and vehicle speed, calculating out an angle which needs correcting, and controlling a steering system of the vehicle to perform angle correction. According to the self-adjusting tyre pressure monitoring system disclosed by the application, when pressure difference between two coaxial tyres is abnormal, automatic correction is performed by the steering system, so that in the process of driving, the vehicle is kept in a scheduled track, and the driving safety is guaranteed.