This paper constructs a theoretical model of the influence of financial education expenditure on intergenerational income, than conducts an empirical test. Study found: (1) On the overall review, financial education expenditure is helpful to promote the intergenerational income mobility, and this effect shows a trend of growth. However, the influence degree on different income levels are different, for lower income families, the promotion is the most effective, but for the lowest income families, financial education expenditure is difficult to have the effect of significantly promote intergenerational income mobility, it needs the social systemic policies cooperation; (2) With the improvement of childrens education stage, the promotion effect of financial education expenditure on intergenerational income mobility tends to decrease, that is, the benefit of financial education expenditure in high school is less than that in compulsory education stage, and the same trend is also been found in lower income families; (3) There is regional heterogeneity in the influence of financial education expenditure on intergenerational income mobility. The promotion effect of financial education expenditure on intergenerational income mobility is stronger in coastal areas than in inland areas. Meanwhile, the regions with high financial education expenditure have a stronger promoting effect on intergenerational income mobility than those with low financial education expenditure. Based on the above conclusions, perfect the coordination between financial education expenditure policy and social systematic policy; Under the epidemic situation, more attention should be paid to ensuring the scale of financial education expenditure, improving its efficiency of use, and reasonably dividing the scale of financial educational expenditure in different regions and different stages of education, which is helpful to play the role of financial education expenditure in mitigating the solidification of intergenerational income classes.