It has not been clearly documented that Astragalus has the effect of treating lung cancer. It is recommended that lung cancer patients take scientific and reasonable treatment measures under the guidance of doctors to improve the symptoms of the disease and prolong the survival time. Astragalus is a kind of qi tonic traditional Chinese medicine, which has the effects of tonifying qi and elevating yang (tonifying qi so that yang qi rises and develops), inducing diuresis and eliminating swelling (facilitating urination and eliminating edema), promoting stagnation and paralysis, generating fluids and nourishing blood (replenishing the body’s fluids and blood), supporting toxin and draining pus (draining pus and toxin from the body), and astringing sores and regenerating muscle (helping sores to heal more quickly and promoting the growth of new flesh), and so on. Astragalus can be used to treat qi deficiency and weakness, low food intake, loose stools (thin and unshaped feces), middle qi subsidence (deficiency of the spleen and stomach qi, with the appearance of internal organs falling down), blood deficiency and atrophy, hemiplegia (inability to move one side of the limbs at will) and other conditions. At present, there is no authoritative data indicating that Astragalus can treat lung cancer. Patients with lung cancer should choose surgical treatment, chemotherapy and radiotherapy under the guidance of doctors according to their conditions, and they can improve their symptoms with traditional Chinese medicine treatment, which can prolong the survival time and improve the quality of life after standardized treatment. Patients who are suffering from superficial solid evil, gas stagnation and dampness obstruction, food stagnation (the food is indigested and accumulated in the stomach), stagnation, sores at the beginning or after ulceration, heat and toxin still prevailing, and yin deficiency and hyperactivity of yin and yang (yin-liquid deficiency and hyperactivity of yang) need to be cautious in taking astragalus. During the period of treatment, patients with lung cancer need to follow the doctor’s instruction for regular review in order to understand the recovery of the disease.