Recently, twoimplantsupported single crown has been applied more and more in molar restoration with the advantages of antirotation, antibend, distributing stress, reducing bone resorption and increasing the success rate of molar restoration. The biomechanical study of two-implant can solve the problems of clinical application such as the stress concentration and the degree of bone resorption around implants, and it could contribute to the development of twoimplant restoration standard of a natural twofurcation simulation and regulate the two implant restoration technique, which is important for its extensive clinical application. Therefore, in this paper, the clinical application, biomechanical and biological characteristics and advantages of two implant will be reviewed.