The invention discloses a tool for removing weeds twined around a ploughing cutter. The tool comprises an installation cylinder, a pushing platform and a driving assembly, one end of the side wall of the installation cylinder is provided with several strip-shaped through holes, each through hole is internally provided with a rotation plate, one end of the rotation plate is hinged to the hole wall of the corresponding through hole, and the side, away from the axle of the installation cylinder, on the rotation plate is arranged to be a knife edge; the pushing platform is located in a central hole of the installation cylinder, and can be in contact with the end, close to the axle of the installation cylinder, of the rotation plate, the driving assembly is connected with the pushing platform, and drives the pushing platform to move around the axle of the installation cylinder. The end, close to the through holes, of the installation cylinder is arranged on a plough coulter in a sleeving mode, the driving assembly is started so that the weeds twined around the ploughing cutter can be moved, and thus the weeds are cut off. Compared with a traditional method of removing the weeds twined around the plough coulter, through the tool for removing the weeds twined around the ploughing cutter, the situation that the hands are scratched by the plough coulter is avoided; meanwhile, the cleaning efficiency is high, and the labor intensity of cleaners is lowered.