基于中国家庭动态调查（CFPS）2018数据，研究了社会资本对就业中过度教育匹配的影响及其作用机制，结果表明：总体上，社会资本对劳动者就业中过度教育匹配具有负向影响，在考虑内生性问题后该结论依旧稳健；考虑群体异质性情况下，社会资本对女性、城市户口持有和学历水平较高的群体出现过度教育匹配方面有着更强的抑制效用；社会资本通过提高关系重视程度、提升内部晋升可能和增强外部市场连接性等影响机制降低就业中过度教育匹配的出现。

Based on the data from the China Family Panel Studies (CFPS) in 2018, this article studies social capital’s influence on over-education matching in employment and its mechanism. The results show that social capital has a holistic negative effect on the over-education matching in employment, and the conclusion remains stable after the endogenous problems are taken into account. Considering group heterogeneity, social capital has a stronger inhibiting effect on over-education matching among the female and groups with city permanent residency and higher educational level. Social capital reduces the over-education matching in employment by attaching importance to relationship, increasing the possibility of internal promotion and enhancing the connectivity with external market.

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