For patients with brain hernia, the success rate of craniotomy can basically reach about 90%-95%, however, one thing must be clear: craniotomy is something that must be done in patients with brain hernia, because only in this way can the patient’s life be saved, however, the success rate of craniotomy and the success rate of the later treatment are completely different. Craniotomy is a very simple thing, open the scalp, open the skull, basically complete the most basic debridement decompression operation. However, whether the operation can be completed within the specified time, and whether the number, position and area of the flaps are in accordance with the regulations, as well as a series of later nerve cell recovery problems, these are the important considerations, so the final success rate is only about 60%-70%. Everyone has a different understanding of brain herniation and different timing of surgery, and all of these can have a very significant impact on the patient’s late success rate.