In recent years, the incidence of systemic malignant tumors has increased year by year, and cancer has become the second leading cause of death of human beings. The improvement of symptoms and the prolongation of survival time are of great importance. We found that the patients’ clinical symptoms recovered faster after intracranial metastatic cancer surgery, especially the peritumoral edema subsided very rapidly. (1) What are the symptoms of intracranial metastatic cancer? The symptoms are usually increased intracranial pressure and focal symptoms, and intracranial metastatic cancer usually has larger tumor size or more severe peritumor edema, so the clinical condition progresses faster, and the patients show headache, nausea and vomiting, etc. Depending on the different parts of the tumor located in the skull, mental symptoms, aphasia, epilepsy, limb movement and sensory disorders, etc. may appear. (2) Indications for surgery of intracranial metastatic cancer 1.Patients with multiple metastatic cancer, whose cranial hypertension cannot be relieved by drugs, can be operated to remove the large metastatic foci in order to prolong their lives; 2.For single metastatic cancer, if the primary foci have been removed, the patient has good general conditions and no other parts of metastasis are found, early surgery should be performed; 3.For patients with intracranial metastatic cancer and primary cancer found successively, the primary foci should be removed first, and then the metastatic foci should be removed. However, if the patient has obvious intracranial symptoms, the intracranial metastases can also be removed first and then the primary lesions; 4. For patients whose primary lesions cannot be removed, only intracranial metastases can be removed to relieve symptoms and prolong life.