The surgical indication for chronic subdural hematoma refers to a symptomatic subdural hematoma with a large blood volume and a very significant displacement of brain tissue, and the patient presents with the corresponding clinical symptoms, mainly the following: 1) symptoms of high cranial pressure, such as headache, nausea, vomiting, etc.; 2) intellectual and cognitive changes, such as memory loss, incontinence, unstable walking, etc.; 3) functional impairment, such as impairment of limb movement, sensory impairment, language impairment, etc.