As the semiconductor industry is the core of the information industry and industry, and it is also concerned with the national defense security, so the mainland semiconductor industry has been strongly supported by the national power from the beginning of its development, and has been rapidly developing in recent years. This paper analyzes the main driving forces of national policy and capital support, foreign investment and so on to promote its development and innovation, as well as the main features of its subject of tech-innovation, innovation mode and independent innovation, and finally points out the shortcomings of the mainland semiconductor industry's development and innovation.