The improvement of production efficiency and changes in business models brought about by the deep integration of the digital economy and the real economy have become an important driving force for industrial transformation and upgrading. This paper expounds the necessity of digital transformation of manufacturing industry and its path selection. The important role of industrial Internet and Internet platforms is pointed out, and the characteristics of industrial Internet platforms such as Midea Group and Siemens MindSphere and their effects on industrial transformation are analyzed. Enterprises should vigorously promote the deep integration of big data, the Internet, cloud computing, the Internet of Things, artificial intelligence, blockchain and the real economy, accelerate the digital transformation of the manufacturing industry, and inject new impetus into the high-quality development of the manufacturing industry.