Pregnant woman safety belt setting method

The invention discloses a pregnant woman safety belt setting method; an inflatable material with good toughness can serve as an abdominal belt, chest belts and shoulder belts; the abdominal belt is fixed in a normal safety belt fixing mode; one ends of two chest belts and two shoulder belts are respectively and symmetrically fixed in a round fixed piece through a connecting buckle, and the other ends are respectively fixed on a vehicle seat back adjusting fixed piece same with that of a normal safety belt; a connecting portion between the chest belt and the shoulder belt and the round fixed piece is provided with a fixed nitrogen emission device; the fixed nitrogen emission device is fixed on a button of the round fixed piece through a connecting line; when the button is pushed, the fixed nitrogen emission device will fast inflate the chest belts and the shoulder belts; the pregnant woman sits on the vehicle seat; the pregnant woman safety belt setting method can prevent the safety belt from binding a belly; the fixed nitrogen emission device can be started to fast inflate the chest belts and the shoulder belts so as to stop impact force caused by vehicle bumping, thus improving safety belt safety factors, and well protecting the baby of the pregnant woman.