At the request of the China Securities Regulatory Commission, all listed companies in China have established and implemented an independent director system. In order to explore the effectiveness and influencing factors of the independent director system, research on the independent director system and company performance is increasing with the continuous improvement of the independent director system in China. This paper uses stock exchanges of the listed companies in Shenzhen and Shanghai in 2019 as a research sample and uses a multiple regression method to study the relationship between independent directors and the performance of listed companies. The results show that the establishment scale, salary level and identity characteristics of independent directors are significantly related to company performance.