The severity of basal ganglia hemorrhage 20ml hemiparesis is mainly related to the timeliness and effectiveness of treatment and the combined dysfunctional conditions, but not directly related to the amount of bleeding. Basal ganglia hemorrhage 20ml can be treated conservatively if it is in the area of shell nucleus, and surgical treatment needs to be considered if it is in the area of thalamus. If timely treatment is provided after basal ganglia hemorrhage, even if the initial neurological impairment is severe, it is possible to obtain a better outcome, and some patients may even completely recover to normal, which is significantly different from cerebral infarction. On the contrary, if the basal ganglia hemorrhage is not treated in time after the hemorrhage, or the treatment effect is unsatisfactory, further cerebral edema, increased intracranial pressure, or even cerebral hernia formation may be formed. At this point, it will cause serious consequences, which may not only manifest as hemiplegia, but can even be fatal. In addition, in addition to hemiplegia, patients with basal ganglia hemorrhage may also suffer from visual impairment, mental disorder, cognitive impairment and personality change, which will have a serious impact on the patient’s daily life and may be difficult to recover. It is recommended to standardize the treatment of basal ganglia hemorrhage when it is detected, and to start rehabilitation exercises when the condition is stabilized, in order to strive for the best prognosis.