Ultra-high temperature sterilized milk. Generally, the shelf life is about half a year. According to the related information, the milk with the longest preservation time is ultra-high temperature sterilized milk, which is also called normal temperature milk. It means that the milk is instantaneously sterilized at ultra-high temperature, that is, from 135℃ to 150℃ for 4 to 15 seconds, completely destroying the microorganisms and spores that can grow in it. Ultra-high temperature technology can effectively kill bacteria, but at the same time, it can preserve the original nutrients of milk.