Canned food for military supplies is divided into canned meat, canned poultry, canned aquatic products, canned fruit, and canned vegetables, with a total of 92 products. The solid content of tinplate cans is as follows: an average of more than 65% for pork, 55% to 90% for poultry, 65% to 92% for aquatic products, 55% to 65% for fruits, and 58% to 85% for vegetables. Shelf life at room temperature: 30 months for meat, poultry and aquatic products, and 24 months for other types. The quality standard of military canned food includes provisions on sensory, physical and chemical, microbial indicators and shelf life. The code identification method of military can lids: the first line number is the code number of the canning factory, the second line is the shift code of the canned production date, and the third line is the code number of the canned product classification and product number. The outer packaging of cans is made of corrugated cardboard boxes, with the name of the can, the name of the manufacturer, the date of manufacture, quantity, net weight, gross weight and volume printed on the front and back respectively.