Aimed at the flexibility of production scheduling of large batch, multi variety and mixed line production mode in digital production line of military industry is poor and the layout restricts the efficiency of resources, the process state is difficult to control, a solution for modeling, simulation and optimization of digital production line for military industry is proposed. Combining with the development trend of production line simulation at home and abroad, the main status of the production line of the military enterprise is analyzed, according to the scene of the production line of the military industry, the simulation model of production system and the general technical scheme of simulation are constructed. The technological and logistics optimization layout of the new generation of military production line is obtained in China. The results show that the scheme can improve the overall production efficiency, shorten the short board of equipment manufacturing, it has some practical significance to the transformation and upgrading of the military manufacturing industry to the intelligent manufacturing.