It is mainly used for the qualitative detection of the nucleic acid of feline calicivirus in cat-related samples, so as to assist in the clinical diagnosis of whether a cat is infected with feline calicivirus. When a cat shows typical symptoms such as oral ulcers, excessive salivation, halitosis, sneezing, coughing, conjunctivitis, lameness (when the virus invades the joints), etc., the use of this kit for detection is helpful to clarify the cause of the disease and determine whether it is caused by feline calicivirus infection, providing key evidence for veterinarians to formulate a reasonable treatment plan.