A method for protecting passengers and its device

The present invention relates to a method for protecting passengers and its device being fitted on the peripheral wall of a car body. In particular, the device for protecting passengers is provided with an igniter, an expander, an outer tube and inner and outer medicament tubes. The inner medicament tube is received with A and B medical preparation, and there are through holes interlaced between the outer and inner medicament tubes. When being hit and dashed, the igniter will allow the expander to blow up and further push the inner medicament tube so that the through holes of the inner and outer medicament tubes can be met correspondingly and the A and B medical preparation may eject to the inner space of the car. Then, the A and B medical preparation can be mixed with air again and expand swiftly to form soft colloid for covering the whole inner space of the car at a thickness of 30 cm. Accordingly, when the car is hit to product shock force, the shock force may be absorbed by the aforesaid device so as to achieve the significant purpose of protecting passengers as well as keeping their personal safety.