This paper does the improvement research on the reliability and feasibility of a certain reserve parachute to solve the problems occurring in its application in troops, reduce casualties in parachute training, safeguard the life safety of parachutists and improve their confidence. A brand new improvement scheme of the reserve parachute pack was put forward by doing researches and analysis on the reasons of problems occurring in its application process. The solutions included: adjusting the structure form of the parachute pack, improving the protective cloth of the pack, changing the package ways and making some micro modifications to some parts of the parachute pack. The results proved that every index of the reserve parachute was improved. In conclusion, the improved design increases the means of automatic parachute opening, which means the parachutists get another insurance to ensure their life security.