A knotting device driven by two toothed discs, said knotting device comprising a small toothed disc (1), a knotting device support (2), a large toothed disc (3), and a knife arm (7), a winding, buckling, gripping and biting mechanism R and a rope clamping device driving mechanism Q assembled on the knotting device support. A composite toothed disc of the knotting device driven by the two toothed discs is divided into the small toothed disc (1) and the large toothed disc (3), and the small toothed disc (1) and the large toothed disc (3) are coaxially fixed at two ends of a knotting device main shaft hole (201), so that a knotting device main shaft bears force in a balanced manner, improving the operational stability of the knotting device. Three rope clamping notches (24) are arranged on a rope clamping disc (16), increasing the length for a rope cutting blade (15) to slide and cut twine, so that a rope cutting action of the knotting device is reliable. A knife arm roller (6) rolls along a spatial profile curved surface, and is in linear contact with a spatial profile curved surface of a cam surface, enabling a carrying capacity to be larger, and reducing wear and tear. The knotting device provided with the two toothed discs has the features that the structure is reasonable, processing and assembly are convenient, manufacturing costs are low, and knotting is reliable.Cette invention concerne un dispositif de nouage entraîné par deux disques dentés. Le dispositif selon la présente invention comprend un petit disque denté (1), un support de dispositif de nouage (2), un grand disque denté (3), et un bras de couteau (7), un mécanisme d'enroulement, flambage, préhension et serrage (R) et un mécanisme d'entraînement de dispositif de serrage de corde (Q) assemblés sur le support de dispositif de nouage. Un disque denté composite du dispositif de nouage entraîné par deux disques dentés est divisé en deux parties, à savoir le petit disque denté (1) et le grand disque denté (3
