Important achievements have been made in the major science and technology projects for large aircraft, with domestically made large transport aircraft, large passenger aircraft and large amphibious aircraft making their maiden flights. Large aircraft is a highly integrated modern high and new technology, which can drive the group breakthrough of key technologies in new materials, modern manufacturing, advanced power, electronic information, automatic control, computer and other fields, and can drive the development of many high-tech industries. The technology diffusion rate of large aircraft is as high as 60%.Large aircraft is at the top of the industrial chain of science and technology, can be called to pull the industrial technology chain of the total leader, its development for driving China’s technological progress and industrial upgrading, to strengthen the strength of the national industry is of great significance.