With the increasing need for high-quality lab animals, the continuous improvement of lab animalstandards has become particularly important. Murine norovirus (MNV) has a high infection rate in lab mice. MNV infectionnot only harms the animals themselves, but also has a great impact on the experimental results. The national standards forlaboratory animals in China do not yet include murine norovirus in the list of routine examination items. We have compiledgroup standards for murine norovirus by referring to the latest research results on murine norovirus at home and abroad,along with relevant foreign standards. This paper introduces the background, and legal and regulatory basis for thepreparation of murine norovirus group standards and explains the sets for the standard content. The establishment of suchstandards should improve the quality of lab animals. They can provide technical support for promoting improved quality of lab animals and adapting to the needs of the international development of lab animals.