It is false that blood type O has the highest average life expectancy. 1. There is no scientific evidence to show that the average life expectancy of people is affected by their blood type, so the claim that blood type O has the highest average life expectancy is unscientific. 2. Existing research results show that the average life expectancy of our people is 76.4 years, of which 75 years for men and 77.9 years for women. The average life expectancy is mainly affected by social environment, natural environment, personal lifestyle and medical technology level. 3. For the human body, the average life expectancy of an individual and the individual’s blood type are not necessarily related, the individual’s blood type is generally only to determine the basic examination of blood transfusion in the relevant treatment, to prevent the emergence of transfusion reaction, in addition to the blood type can be used for paternity testing.