The work aims to prepare a modified polyethylene plastic that can meet the requirements of anti-static and aging resistance for a certain ammunition packaging. Firstly, a polyethylene plastic with better aging resistance was selected from the commonly used polyethylene plastics for ammunition packaging as the main material of the ammunition packaging. Secondly, with the help of plastic modification technology, the polyethylene plastic modification formula design was developed, and the performance of modified polyethylene plastic was verified. Finally, according to the relevant standard test methods, the life evaluation of modified polyethylene plastics was carried out. The surface resistivity of the inner and outer surfaces of the modified polyethylene plastics studied was 0.1-10 GΩ∙m, and the storage life was about 11.43 years. The modified polyethylene plastic studied meets the requirements as a certain ammunition packaging material.