With the rapid development of industrial Internet industry, industrial Internet provides a feasible path for the transformation and upgrading of China's manufacturing industry. This paper discusses the impact of industrial Internet on the transformation and upgrading of China's manufacturing industry from three aspects. First, industrial Internet builds a seamless platform for enterprises and users to promote the transformation of manufacturing enterprises into service. Secondly, the industrial Internet improves the production efficiency of enterprises, optimizes the production process, innovates the production mode, and promotes the efficient transformation of manufacturing enterprises. Thirdly, the industrial Internet has been applied in industries with high energy consumption and high pollution, effectively improving energy efficiency, reducing pollution emissions, and helping the ecological transformation of manufacturing enterprises.