Effective treatments for brain metastasis of lung adenocarcinoma include comprehensive treatments such as surgery, radiotherapy, chemotherapy and targeted therapy. Brain metastasis of lung adenocarcinoma suggests that tumor cells have spread and metastasized, and the prognosis is poor. Surgical resection can be done if there is an indication for surgery, and if there is no opportunity for surgery, radiotherapy and targeted therapy can be used to shrink the tumor lesions and inhibit further spread and metastasis of the tumor, thus prolonging the life span of the patient and improving the survival time of the patient. The chemotherapy drugs that patients can choose include cyclophosphamide, cisplatin, fluorouracil and so on, and the targeted drugs include gefitinib, bevacizumab and so on. Drugs need to be used in strict compliance with medical advice, there are diarrhea, headache and other adverse reactions to recommend timely medical attention, drug allergy is prohibited.