The survival of brain metastasis tumor without treatment is only 4 weeks, the survival of whole brain radiotherapy is 3~6 months, and the survival of pure surgical treatment is about 5 months. Early stage patients mostly take whole brain radiotherapy treatment, which has high side effects and low tolerance of patients. With the development of medical technology, gamma knife treatment has been applied in clinic, which greatly improves the survival rate of patients. 1.How to choose lung cancer brain metastasis treatment? Surgery, radiotherapy, chemotherapy and stereotactic radiosurgery are the common treatments for lung cancer brain metastases nowadays. Since most of lung cancer brain metastases are round lesions with clear boundary and radiobiological characteristics of early response tissue, they are suitable for radiosurgery. Among them, stereotactic radiosurgery represented by radio knife, gamma knife and X-knife has become an important means of treating lung cancer brain metastases due to its real curative effect and small treatment trauma. 2.Which treatment is the best? There are advantages and disadvantages in any treatment, such as brain tumor is relatively large, traditionally, surgical resection is the main first step, and the residual lesions in those important tissue and nerve parts can be treated by Gamma Knife Radiotherapy in secondary treatment. Chinese medicine treatment is an adjunctive therapy for the follow-up treatment of brain tumor. Chinese medicine treatment can improve the immunity of the body, improve the overall quality of the patient, and better accept other treatment modalities.