The data of 460 GEM companies from 2014 to 2019 is selected as a sample, the relationship between enterprise informatization, technological innovation and enterprise development quality is analyzed, and the intermediary effect of technological innovation in enterprise informatization and improving enterprise development quality is tested. It is found that enterprise informatization has a positive role in promoting technological innovation. With the improvement of informatization degree, the role of enterprise informatization is enhanced; Technological innovation plays a positive role in improving the development quality of enterprises. With the improvement of technological innovation ability, the promotion role increases; Enterprise informatization plays a positive role in improving the quality of enterprise development. With the improvement of informatization, the promotion role increases; Technological innovation plays an intermediary role in improving the quality of enterprise development. The heterogeneity test results show that in technology intensive enterprises, the effect of enterprise informatization on the improvement of enterprise development quality is more significant, while in enterprises in the eastern region, the effect of enterprise informatization on the improvement of enterprise development quality is more significant. According to the research results, it is proposed to strengthen enterprise information construction, give play to the promoting role of technological innovation and provide necessary support for enterprises, so as to provide reference for the development, policy-making and related research of GEM companies.