The invention discloses a tire rim separating unit for a motorbike. The unit comprises a fixed pedestal and a rotational sleeve frame, two sides of the fixed pedestal are both spirally connected witha fixing clamp through a connecting stud bolt, the top center of the fixed pedestal is rotationally connected with a rotational sleeve frame through a bottom connecting frame, a top connecting frame is welded at the top center of the rotational sleeve frame, the top connecting frame is rotationally connected with a separating handle through a rolling bearing, the bottom of the separating handle isrotationally connected with an adjusting screw rod through a fixed support, an adjusting stud bolt is connected with a connecting rod through a connector, and the bottom end of the connecting rod isrotationally connected with a rotational separation shaft. In the tire rim separating unit, by arranging the adjusting screw rod, the distance of the connecting rod can be adjusted, so that the rotational separation shaft can be adjusted, the tire rim separating unit for the motorbike can be suitable for motorbike tires with different diameters in use, and the range of application is wider.