Non-small cell lung cancer (NSCLC) is a disease with high morbidity and mortality, poor prognosis, and a lack of safe and effective treatment. Lifei Xiaoji Wan has significant advantages in the treatment of advanced NSCLC, but the a lack of high-level clinical evaluation evidence and accurate mechanism of action research. According to the previous animal experiments of the team, it was proved that Lifei Xiaoji Wan can significantly inhibit the tumor growth ability of lung cancer mice, and inhibit the proliferation, clonal formation, and migration ability of lung cancer cells. This topic intends to adopt the method of multicenter randomized controlled study to observe the Lifei Xiaoji Wan for advanced NSCLC patients' overall survival (OS), progression-free survival (PFS), Functional Assessment of Cancer Therapy-Lung (FACT-L), TCM symptoms and syndrome and safety, help to clarify the role of Lifei Xiaoji Wan in TCM prevention and treatment of lung cancer, can provide high-level evidence for TCM prevention and treatment of lung cancer research and clinical.