The life-saving platform can provide remote life-saving materials and refuge facilities for victims who encounter sudden natural disasters and accidents within the delivery radius, and has the ability to improve the survival chances of victims. The rescue platform in this article is equipped with a modular floating airbag to provide the rescue platform with long-term floating capacity. In order to evaluate whether the connection belt and airbag pressure of the modular floating airbag and the selection of airbag material and connection belt material meet the requirements when the life-saving platform enters the water with different posture, three water entry posture were simulated and calculated. The simulation results show that the pressure of the connecting belt and the airbag of the water entry posture 2 is the most tested, and the design of the connecting belt and the airbag has a large safety space.