The possible reasons, as well as the solutions, of happening the re-contaminated UHT milk in domestic middle and mini-type milk factories were discussed from aspects of equipment in the product line.

• 本文主要从设备的角度以实例探讨了我国中小型乳品厂无菌包装鲜奶超高温灭菌后受到二次污染的主要原因。