People with AB blood type can get married, not can’t get married, because the human ABO blood type system is classified according to the different antigens on the red blood cell membranes. People with AB blood type are able to marry and have children because blood type is hereditary. The offspring can be A, B, O, or AB, which means that the offspring of people with AB blood type can have four different types of blood types regardless of their spouse’s blood type, and these offspring are healthy and are not affected by the AB blood type of the mother or father, so AB blood type can get married.