The classics of traditional Chinese medicine(TCM) are not only the guiding source of the theoretical system of traditional Chinese medicine, but also the fundamental law guiding the clinical practice of TCM. As a Chinese medicine practitioner, we must carefully learn classics of traditional Chinese medicine. To studying classics of traditional Chinese medicine, we must strive to integrate all the theories into clinical practice on the premise of reading and understanding classics of traditional Chinese medicine. To study the classics of traditional Chinese medicine, we should not only base on practice, but also guide the clinical practice with the classical theory of traditional Chinese medicine. Only the combination of theory and practice can complement each other, and improve the level of Chinese medicine theory and clinical practice.