Nowadays, civil aviation does not have effective life-saving ways in the air, the death rate for the air crash remains high and the security of personnel cannot meet the needs of civil aviation development. Through the study of many air accidents, the “life saving flight period” was found, which introduces a new technology of automatic life-saving structure. That’s a life saving system in the air consisting of automatic life-saving structure, the aircraft and people in the airliner. The function of this system is that when the passenger plane is in danger, people in the plane can leave the plane quickly and landing safely on land or on water, which can effectively reduce or avoid casualties and change the condition of life saving in plane crashes. At the same time, it points out a new direction of airliner life saving in the air.