The invention discloses a large-opening blind hinge which is suitable for hinging a door leaf and a door frame; the large-opening blind hinge comprises a blind hinge frame piece, a blind hinge leaf piece and a blind hinge bolt; under the arrangement of an L-shaped bending section, a mounting section and the blind hinge leaf piece, a maximum opening and closing angle far larger than 90 degrees can be achieved, the defective rate is reduced, secondary assembly is avoided, meanwhile, the application range is greatly widened, the requirements of different users can be met, assembling parts such as a door frame hinge connecting plate, a hinge gasket, a door leaf hinge connecting plate, a door frame hinge box, a bearing, a blind hinge door frame hinge box upper cover and a plurality of bolts for connecting the blind hinge frame piece and the blind hinge leaf piece are reduced, so that the production cost is reduced, the assembling efficiency is improved, the outer surface of the door frame is a whole plane, the door frame is more attractive, the situation that abnormal sound occurs in the long-term use process of a door product is avoided, and the user experience is better.