Abstract: In recent years,with development of the theory of biportal endoscopy and the continuous updating and optimization of relevant surgical instruments and techniques,biportal endoscopic lumbar interbody fusion (BELIF) has become a new choice of minimally invasive lumbar interbody fusion surgery.BELIF not only has the advantages of traditional spinal endoscopy,such as less trauma,magnifying the surgical field and avoiding the operator’s bow for a long time,but also could use traditional open surgical instruments,which is more efficient and flexible and widely decompressed.However,it also has some disadvantages,such as longer operation time and steep learning curve compared with traditional open surgery.Moreover,at present,BELIF has a short development history,the followup time of most relevant studies is short,and its safety and efficacy are still lack of highlevel evidence support.It is necessary to further evaluate and verify the medium and longterm efficacy of this technology.This paper reviews the development history,technical points,indications,contraindications,advantages and disadvantages and complications of BELIF.

Key words: biportal endoscopy, lumbar interbody fusion, spine