Prepuse automatic amputating ring

The utility model relates to a prepuce automatic amputating ring, which comprises an inner ring and an outer fixing ring, wherein, the inner ring is a sealed concave ring of which the ring surface is concave, and the concave of the inner ring has a low inner part and a high outer part; the outer fixing ring is arranged on the concave of the inner ring, and the outer fixing ring is a ring having an opening and an edge baffle plate. The prepuce automatic amputating ring has the advantages of simple structure, convenient arrangement and taking off, unique appearance, etc. When the utility model is used, no operation, complaint or bleeding is caused; no ripping line needs to be sewn, and the utility model has orderly joint edge, simple operation, small damage, short service life and is easily accepted by patients.