Stereotactic neurosurgery technique, referred to as brain stereotactic surgery, refers to the use of the principle of stereotactic positioning at one point in space to first find out the coordinates of an anatomical structure or lesion in the brain, that is, the target point in the cranial cavity, to determine its precise location, and then use a stereotactic instrument, special instruments and devices dedicated to stereotactic surgery into the cranium, so that it reaches the target point, the structure or lesion for surgical treatment, in order to carry out physiological The aim is to study, diagnose or treat brain diseases. The main features of this technique are precise localization and minimal invasiveness, and it is playing an increasingly important role as a key component of neurosurgery. Modern clinical applications of stereotactic surgery include: functional neurosurgical diseases and various occupational diseases in the brain. The treatment of functional neurosurgical diseases was the earliest attempt of stereotactic surgery, and it can be said that it accompanied the whole process of stereotactic surgery development; while the treatment of various occupying lesions in the brain as the focus of stereotactic surgery is only in the last decade or so. Currently, for functional neurosurgical diseases, the scope of brain stereotactic surgery includes: tremor palsy, torsion spasm, chorea, tardive dyskinesia, throwing syndrome, epilepsy and intractable psychosis and pain. The rapid development of imaging techniques such as CT, MRI and PET in the last decade has led to the development of the localization of nucleus accumbens destruction from the indirect measurement of nucleus accumbens on X-ray ventriculography to the direct measurement of nucleus accumbens at the CT and MRI level, which is quite accurate for nucleus accumbens target localization. In addition, the use of positive microelectrode stimulation during surgery followed by nucleus destruction technology; and the application of “cell knife”, the lesion destruction can be precisely limited to the cellular level; furthermore, the efficiency of functional brain stereotactic surgery has been improved. With the development of radiological imaging and the improvement of treatment technology, small lesions in the brain and important functional areas are becoming more and more common and are expected to be treated by neurosurgeons through stereotactic surgery. Today, brain stereotactic instruments are as essential to neurosurgery as operating microscopes, ultrasonic surgical aspirators, and laser knives. There is no other technology other than stereotactic technology that can achieve high precision positioning within 1mm. Stereotactic surgery can address small intracerebral lesions that are not suitable for craniotomy, deep lesions, multiple lesions and lesions located in important functional areas. As far as the lesion site is concerned, there is no restriction on stereotactic surgery whether it is located in the brain, cerebellum or brainstem. It is clear that for elderly and frail patients, stereotactic surgery has the advantage of being less invasive. Brain stereotactic surgery is safe and reliable, and in recent years, its surgical mortality rate has been reduced to 0%-1%, and the disability rate is only 1%-3%. Since the introduction of frameless stereotactic technology, our department has carried out a variety of operations such as stereotactic brain abscess puncture and aspiration, functional area tumor resection, etc., and achieved satisfactory results.