Based on the development of CSR and sharing values in China, this paper selects the software and information technology service industry as the research object from 2019 to 2022 and uses the OLS method and the plug-in program PROCESS V3.5 of SPSS to explore the relationship between employee sharing, per capita contribution and sustainable development ability, as well as the indirect effect of per capita contribution on the relationship between employee sharing and the company's sustainable development ability. The research findings are that the better the overall performance of employee sharing behavior, the higher the per capita contribution of the employees, which in turn improves the sustainable development ability of the company. In addition, the higher the employee compensation, the higher the per capita revenue generated by employees, which increases in the firm's ability to sustainably development. The performance of employee security and employment, on the other hand, has no significant effect on per capita contribution and firm sustainable growth rate. This paper also provides recommendations based on the findings of the study.