the total amount of medical insurance fund refers to the total income of medical insurance fund in a certain period of time. The medical insurance fund is composed of medical insurance participants, the government and other sources of funds, and is mainly used to pay the medical expenses in medical insurance coverage, including outpatient service, hospitalization, medicines, examinations and other expenses. The total amount of medical insurance fund directly reflects the medical insurance investment of medical insurance participants and the government in a certain period of time, and also reflects the economic development level of the region or country and the implementation effect of medical insurance policies.