The equipment manufacturing industry greatly affects the development of the national economy, and its technological innovation efficiency is conducive to the innovative development of the industry and the region. Based on the latest data of Liaoning equipment manufacturing industry, the stochastic frontier approach is used to construct a model of technological innovation efficiency measurement and influencing factors and passed the hypothesis test. The research shows that the overall technological innovation efficiency of Liaoning Equipment Manufacturing Industry is stable and improving, of which the efficiency gap between 7 industries is small, and the range of changes is relatively stable, while the degree of specialization of R&D personnel, the ownership structure of enterprises, and the degree of opening up play a major role in promoting the technological innovation efficiency of Liaoning equipment manufacturing industry.