Abstract:The overall social responsibility level of private enterprises in China is low and there is a phenomenon of “confluence of two poles”. Based on the political identity of senior executives, the “catering “behavior of corporate social responsibility is analyzed. The research finds that the political identity of senior executives significantly promotes the CSP overinvestment of private enterprises, but does not significantly inhibit insufficient investment of social responsibility. It proves that there is a "catering tendency" in the social responsibility fulfillment of private enterprises,and that the fulfillment of social responsibility is a “symbolic”or “strategic” behavior. The empirical research has explained the phenomenon of "two-poles confluence". Further studies finds that pay gap weakens the positive correlation between executive’s political identity and CSP overinvestment of private enterprises. It shows that salary incentive has governance effect on "government intervention" of political identity. Empirical studies further indicates that executive’s overconfidence plays a positive regulating effect between political identity and CSP overinvestment. The above research reveals that the establishment of a new relationship between government and business is of great significance to the construction of a benign mechanism for private enterprises to fulfill their social responsibilities.