The Internet has broken the time-space constraint of the manufacturing industry, optimized the allocation of factors and promoted the high-quality development of the manufacturing industry. Based on the 2012 world bank enterprise survey data, this paper empirically tests the impact of Internet on the development quality of manufacturing industry and its transmission path, and tests the impact of "Internet + manufacturing" on its development quality.The development quality of the manufacturing industry represented by innovation and efficiency. The research finds that the Internet promotes the high-quality development of the manufacturing industry, and the Internet promotes the high-quality development of the manufacturing industry by improving the allocation efficiency of capital factors and labor factors. In addition, the integration of the Internet and manufacturing production, sales and research and development is conducive to the high-quality development of the manufacturing industry, among which "Internet + research and development" has the most significant impact on the development quality of the manufacturing industry. Based on this, this paper puts forward policy suggestions to promote "Internet + manufacturing" and promote high-quality development of manufacturing industry.