The basic medical fund payment refers to the payment method of medical expenses such as drugs, diagnosis and treatment items and surgery paid by the medical insurance fund in the medical insurance catalogue. In China's medical insurance system, residents need to pay certain medical insurance fees to become medical insurance participants. Residents who need medical services in hospitals, clinics and other medical institutions can settle their expenses through the payment of basic medical funds. Medical institutions declare expenses to the medical insurance fund, and the medical insurance fund pays the expenses that meet the medical insurance catalogue after examination, while residents only need to pay part of the expenses outside the medical insurance catalogue. The payment method of basic medical fund aims at ensuring the basic medical needs of medical insurance participants, reducing the burden of medical expenses and improving the level of medical security.