Lung cancer is a severe threat to human health. So far, although western medicine has made continuous progress in treating lung cancer and its efficacy, various treatments of western medicine are accompanied by severe side effects. In the clinic, tonifying qi and resolving phlegm method is a traditional Chinese medicine (TCM) treatment for lung cancer, especially non‐small cell lung cancer (NSCLC). In this paper, the pharmacological mechanism of TCM, clinical observation, and in vivo and in vitro experiments are introduced to provide a basis for better research and use of the treatment of malignant lung tumors and their related clinical symptoms.