The invention relates to an interface type interbody fusion cage. The interface type interbody fusion cage comprises a fusion part A, a fusion part B and a connection part connected between the fusion part A and the fusion part B. The outer end face of the fusion part A and the outer end face of the fusion part B are each of a porous mesh structure, meshes A of the porous mesh structure of the outer end face of the fusion part A penetrate through the fusion part A axially, an opening in the inner side of each mesh A is larger than an opening in outer side of the mesh A, meshes B of the porous mesh structure of the outer end face of the fusion part B penetrate through the fusion part B axially, and an opening in the inner side of each mesh B is larger than an opening in outer side of the mesh B. As the inner parts of the meshes A and the meshes B in the end faces are larger than the outer parts, the vertebral body can not be pulled out of an fusion cage body once bones grow in from the meshes A and the meshes B, the bones grow in from the two end faces of the fusion cage body, and therefore the fusion cage body plays the role of a supporting connector. The interface type interbody fusion cage greatly shortens the bone growth distance and healing time and increases the fusion rate, so that postoperative immobilization time is shortened for a patient, and mental and physical pain of the patient is alleviated.