According to statistics, 70% of national highway traffic accidents are due to tire blowout, and a speed of more than 160km/h makes mortality possibility up to nearly 100%. In light of this, the Tire Pressure Monitoring Inflatable Restraint System is put forward. Sensor can send signals to the controller, and then the controller directs the gas generator to generate a lot of gas instantly, and the tire is inflated, so that the instability of the vehicle is eased. In this paper, principle and process of TPIS are illustrated in detail. The process of blowout, sensor detection, control process and the vacuum tire inflation are also scientifically analyzed.