In the modern period, a new trend of combing traditional Chinese medicine and western medicine and the science of traditional Chinese medicine has taken shape. With the widespread use and development of western medicine, many traditional Chinese medical workers with modern scientific thoughts, such as TangZonghai, Zhu Peiwen, Yun Tieqiao and Zhang Xichun advocated integrating Chinese medicine and western medicine because both of them have their own advantages and put forward a series of ideas on how to integrate them in theory and practice. Records of Integration of traditional Chinese and Western Medicine（Yi Xue To Zhong Zhong Can XiLu）, wrote by Zhang Xichun, is a masterpiece of the integration of traditional Chinese and western medicine.
After the founding of the People's Republic of China, the government has promoted the integration of traditional Chinese medicine and western medicine, and then advocated studying traditional Chinese medicine with modern multi-disciplinary approaches. Therefore, the theoretical development of traditional Chinese medicine in this period has the three main achievements: First, the theories of traditional Chinese medicine have become more systematic and standardized after sorting researches, and a series of national textbooks have been compiled and published; Second, a variety of modern scientific methods have been applied for making researches of traditional Chinese medicine, and many scientific achievements have been attained and many monographs have been written; Third, the thinking way of constructing the theoretical system of traditional Chinese medicine has been studied, and the origin of the concepts in the theories of traditional Chinese medicine and the ways of further developing and innovating traditional Chinese medicine have been discussed.