It is mainly used for the qualitative detection of canine parvovirus nucleic acid in relevant samples of dogs, thus providing an auxiliary diagnostic basis for canine parvovirus infection. When dogs exhibit symptoms suspected of canine parvovirus infection, such as vomiting, diarrhea, loss of appetite, and listlessness, this reagent can assist veterinarians in quickly and accurately determining whether the dogs are infected with the canine parvovirus, so as to formulate treatment plans in a timely manner and improve the cure rate.