Patients with lung cancer can take reishi, which is warm in nature, mild in taste, and enters the liver and kidney meridians, and it has nourishing and strengthening effects. Modern pharmacological studies have shown that Reishi has many biological activities, including hypoglycemic, anti-ulcer, anti-cancer, immunostimulatory, anti-inflammatory, and antioxidant. Studies have found that the anti-cancer profile of Ganoderma lucidum is mainly due to the Ganoderma lucidum polysaccharides and triterpenes it contains. Low doses of Ganoderma lucidum polysaccharides can accelerate recovery from leukopenia, bone marrow suppression and immunosuppression in immunosuppressed mice, which is beneficial in cancer chemotherapy. Further clinical and experimental studies have shown that Ganoderma lucidum polysaccharides not only have anti-proliferative, pro-apoptotic and anti-migration effects on tumor cells, but also have anti-angiogenic and immunomodulatory effects. Therefore, the combined application of Ganoderma lucidum polysaccharides is beneficial to tumor patients receiving conventional chemotherapy or radiotherapy, which helps to improve patients’ immune function and reduce the toxic side effects of conventional treatment, so lung cancer patients can take Ganoderma lucidum.