Lung cancer is the cancer with the highest morbidity and mortality in China, posing huge pressure on the healthcare system. The elderly have a high incidence of lung cancer. Elderly lung cancer patients are prone to frailty, which will increase post-operative complications, adverse reactions to radiotherapy and chemotherapy, the risk of all-cause death, length of hospital stay and readmission rate, and seriously affect prognosis. Frailty is reversible, and early detection and intervention are crucial. In this article, we reviewed the risk factors of frailty, its correlation with adverse health outcomes, and its intervention strategies in the elderly lung cancer patients, for its early identification and timely interventions clinically, thus improving patients′ prognosis.