According to the research scope of this paper, the milk production life cycle is divided into the following two subsystems: production and packaging. Due to the relatively concentrated production workshop inside the enterprise, the environmental impact caused by material transportation is negligible. When utilizing the life cycle assessment data of the milk production process, consider the scope strictly confined to production and packaging within the enterprise. The environmental impacts of material transportation within the production site are deemed insignificant. Exclusions include processes outside the facility that contribute to the environmental load. For accurate LCA results, comply with the relevant ISO standards for consumption analysis and environmental emissions associated with each stage of milk production. Use the identified environmental impact factors for the improvement of clean production practices and enhancement of the environmental performance in the milk industry.