To enhance work precision, reduce risks, and prolong the service life of the system, an automatic specialized machine for ammunition sealing is designed. The system comprises modules such as the overall structure, lead sealing, rotary wire tightening, and wire conveying system. PLC is adopted as the control core, enabling automated control of functions such as wire insertion, lead sealing, and wire tightening through programming. Reasonably designed lead sealing mechanisms, rotary wire tightening mechanisms, and angle seat mechanisms ensure stable passage of the wire through the reserved wire holes in the box body and the lead sealing block, thereby enhancing the reliability and stability of the structure. The results indicate that this research can meet the production needs of ammunition sealing and provide a new solution for improving the production efficiency and quality of ammunition sealing.