This paper uses the data of service industry listed companies, by applying the method of DID and PSM-DID, from micro level to analyzed service companies to develop overseas business have the influence on the enterprise employment scale and employment structure, and the mediation effect of FDI in service industry. The results show that the service companies develop overseas business have significantly increased the size of the enterprise employment, have no obvious impact to the enterprise of the ratio of highly educated workers, significantly reduces the enterprise the ratio of technical staff accounted, the opening of service industry intensifies the promoting effect of the influence of overseas business of service enterprises on the employment scale and employment structure.. The above conclusion indicates that the effective way to optimize the employment structure and solve the employment problem is to promote the service industry to open wider, give priority to employment strategy and introduce high-quality foreign investment.