In 1985, the post doctoral system was formally established in China. With the continuous progress of China's overall scientific research level and the improvement of the reform of the higher education system, the post doctoral system has become one of the basic systems to promote the development of China's higher education and scientific research, and has assisted in the cultivation of indigenous high-level innovative young talents, which has greatly met the talent demand brought about by China's independent economic development since the reform and opening up, and has explored a path of talent cultivation and scientific research innovation with Chinese characteristics. At present, the competition for science and technology and talents in the world has become intense, intense and normalized. The game between countries focuses on talents. Further exploration and promotion of China's post doctoral system construction are conducive to the implementation of major strategies such as "accelerating the construction of the world's important talent center and innovation highland" and "building an independent knowledge system", promoting the vigorous development of China's talent cause and higher education cause, and laying a solid foundation for talent power. An important way for the development of cross disciplines and the training of interdisciplinary teaching and research talents in colleges and universities If at the beginning of its establishment, the post doctoral system was to face the real environment of insufficient scientific research conditions and talent training resources, focus on the overall planning of research forces and superior resources in colleges and research institutes, and produce more results and faster results. The current post doctoral system is based on a sound and mature discipline talent training, which has become an important way for the development of cross disciplines and the training of interdisciplinary teaching and research talents in colleges and universities. First of all, the post doctoral system originated from the breakthrough of the traditional personnel management system in ordinary colleges and universities, providing a flexible and feasible way for high-level researchers to join the teaching and research team in colleges and universities. Because it does not occupy the personnel establishment of the station setting unit, the state and the unit provide a certain amount of living and scientific research expenses, and at the same time, it has the advantage of giving preferential policies in terms of salary, housing conditions, professional title evaluation, etc., the nature of the post doctoral system "special talent zone" is more obvious, forming a significant aggregation effect. All research universities make full use of the special policy advantages of the post doctoral system to attract more excellent returnees and young researchers, so that they can adapt to and integrate into the localized frontier research practice as soon as possible, shorten the landing time of international talents and theoretical talents, play the role of buffer, accelerator and calibrator, and become the "reservoir" of high-level talents in universities. Secondly, the post doctoral system of colleges and universities directly faces the scientific research attribute of research universities. It is an important form of organized scientific research, which is conducive to enhancing the competitiveness of universities and forming a key breakthrough in the field of scientific research. The core of organized scientific research is to reconstruct the organizational ecology of scientific research. Postdoctoral research mobile stations in colleges and universities have structural advantages. They focus on the frontier, have clear goals, mature methods, and perfect systems. They can organically combine with the dominant disciplines in the construction of "double first-class". They can quickly select talents and form teams in the overall scientific research layout, serve the medium and long-term planning of major universities, and become the new force of organized scientific research in colleges and universities. In China's research universities, a large number of high-level post doctoral researchers are facing the world's scientific and technological frontier, and have contributed wisdom and played an important role in tackling major scientific research problems around national strategies, major powers and key core technologies. Some major frontier research projects are led by high-level post doctoral researchers,