It is of great significance to calculate the age group mortality rate for analyzing the population mortality situation. The mortality rate of men and women and different ages is very different from that of different causes of death. Infant and child mortality rate is higher, male is higher than female, and the mortality rate of middle-aged and young people is lower, reaching the lowest point at the age of 8 ~ 15, and then rising gradually until all of them die. The mortality distribution of each age group is V-shaped. With the gradual improvement of medical and health conditions, the order of causes of death in China has changed significantly. In 1950s, respiratory diseases, acute infectious diseases and tuberculosis accounted for the top three deaths. 1957 The mortality rate of respiratory diseases in some cities was 120.3/65438+ ten thousand people, accounting for 16.86% of the total deaths. The mortality rate of acute infectious diseases is 56.6/654.38+ 10,000 people, accounting for 7.93% of the total deaths; The mortality rate of pulmonary tuberculosis is 54.6 deaths per 65,438+10,000 people, accounting for 7.5 1% of the total deaths. The death toll of the three accounts for 32.3% of the total death toll. In 1980s, the top three diseases were cerebrovascular disease, heart disease and malignant tumor. 1985, the death rate of heart disease in some cities was 13 1.04/65438+ 10,000, accounting for 23.39% of the total deaths; The cerebrovascular mortality rate was 1 17.52/65438+ 10,000 people, accounting for 20.98% of the total deaths. The mortality rate of malignant tumor is 65438+ 10,000 people 1 13.86, accounting for 20.32% of the total deaths. The three accounted for 64.69%.