The survival period of patients with brain tumors without surgery cannot be generalized, but is mainly related to the nature, severity and treatment of brain tumors, and should be analyzed on a problem-specific basis. Brain tumors are divided into benign and malignant. Generally speaking, if the tumor is benign, it will grow slowly and will not cause damage to the surrounding tissues or metastasis, so it will not affect the life expectancy of the patient. However, it should be noted that if the review indicates that the tumor is progressively enlarging or the patient has developed corresponding pressure symptoms, it is still recommended that the patient should undergo surgical resection as soon as possible to avoid delaying the best treatment time, increasing the treatment difficulty and even causing adverse consequences. If the patient is a malignant tumor, it is recommended that if the conditions are met, especially for early stage patients, it is best to undergo surgical resection treatment in time. If the cancer can be completely removed, the patient has a good prognosis and can even survive for a long time. Of course, if the patient really no longer meets the indication of surgery, he/she should also actively cooperate with radiotherapy and chemotherapy, and if the patient is sensitive to the treatment effect, the survival period can still be prolonged. If no treatment or poor post-treatment effect, the prognosis is poor and the survival period will be greatly shortened. In conclusion, how long a brain tumor can live without surgery varies from person to person. It is recommended that both benign and malignant tumors should actively cooperate with doctors for standardized treatment to prevent delaying the disease and affecting the prognosis.