Social security fund is a project set up by national government departments to prevent medical and pension problems that citizens may face in the future. Social security fund is another name of social pooling insurance fund, and its main businesses include endowment insurance, unemployment insurance, work injury insurance, medical insurance and maternity insurance. The purpose of these funds is to protect citizens' life and health needs in some cases. Interpersonal security fund refers to an individual's personal account in the social security fund, which is used for the accumulation and withdrawal of personal benefits such as pension and medical insurance.