The income of social insurance fund includes: social insurance premium income, interest income, financial subsidy income, transfer income, ranking subsidy income and ranking income. Its income refers to the social insurance premium income, which refers to the fees paid by the payer according to the proportion of the payment base. Interest income refers to the interest income obtained by purchasing bonds with social insurance funds or depositing them in banks. Financial subsidy income refers to the transfer of income from social insurance funds subsidized by the same level of finance. Social insurance risk is transferred to the level of fund income. Subsidy income refers to the subsidy income allocated by the social insurance agency at the same level. Income level refers to the fund settlement income received by the social insurance agency at the same level.