The work aims to analyze the difference of various military protective packaging requirements, and study the classification of military protective packaging levels according to the demand difference of protective packaging. The classification indexes of protective packaging levels for the selected military products were subject to the dimension reduction process through the principal component analysis method, and then the clustering analysis was conducted based on the new indexes obtained from the dimension reduction of various military products. Three new classification indexes and scores for the new indexes of a variety of military products were obtained by index dimension reduction. Based on that, ten kinds of military products were divided into three military protective packaging levels according to the different protection requirements. This method eliminates the information overlap between classification indexes, distinguishes the difference of protective packaging demand for different military products and classifies the protective packaging levels according to the demand difference of all kinds of military products.