Abstract: This paper summarizes the Chinese medicine diagnosis and treatment experience of Professor Wang Shuchuan, the first session national famous Chinese medicine practitioner, on paediatric Mycoplasma pneumoniae pneumonia. It concludes that the main etiology and mechanism of paediatric Mycoplasma pneumoniae pneumonia is wind-warmth attacking the lungs, phlegm-heat stagnation, and injury of both qi and yin. During the initial phase, there is an invasion of the lung by dryness and warm winds, with lung depression and loss of dispersion being the priority; the progression phase is mainly characterized by heat stagnation and phlegm coagulation, with phlegm heat blocking the lungs; the recovery phase is characterized by qi depletion and damage to the yin, along with yin deficiency and the pathogenic qi lingering internally. Accordingly, the treatment of Mycoplasma pneumoniae pneumonia is divided into three stages according to its main symptom of cough. The initial cough phase focuses on dispersing the lung and moistening the dryness with pungent-cool; the phlegm cough stage pays attention to clear the heat and purge the phlegm; the deficiency cough stage focuses on benefiting the qi and nourishing the yin and reinforcing the healthy qi, which has achieved satisfactory clinical efficacy.