The behavior of corporate earnings management is an important factor restricting the development of the industry. Based on the senior echelon theory, TMT’s demographic characteristics such as the cognitive basis, observation, values and other characteristics, affect their strategic decisions, and thus affect the company’s performance and development of the industry. This paper selected 3588 listed companies from 2010-2017 using the revised Jones model to measure the earnings management degree of listed companies, and analyzed the impact of senior management team members on enterprise earnings management in three dimensions of age, education level and professional background. The study found there is no obvious correlation between the age heterogeneity of TMT and the degree of earnings management; the heterogeneity of the education level and the heterogeneity of professional background have a significant negative correlation with the degree of earnings management. This study can improve the corporate governance structure, promote the reform of the market supervision mechanism, protect the rights and interests of investors, and then promote the healthy development of the industry.