The disclosure belongs to the field of microorganisms, and in particular relates to a strain of Akkermansia muciniphila and a product and application thereof. The A. muciniphila is AKK PROBIO, with a preservation number of CGMCC No. 20955. AKK PROBIO of the disclosure has good tolerance, high safety, wide indications, and a good therapeutic effect, can prevent and treat diseases such as colitis, colorectal carcinoma, Alzheimer's disease, and gouty arthritis, and has very good clinical application prospects.