Novel ostomy bag trimmer

The utility model discloses a novel ostomy bag trimmer, which is characterized in that a force applying handle is arranged on the upper surface of a trimming pressing plate, a movable expansion-shrinkage sleeve is embedded in a pressing plate middle through hole in the middle of the trimming pressing plate, and an expansion-shrinkage adjusting mechanism is arranged in the middle of the force applying handle corresponding to the movable expansion-shrinkage sleeve; a handle containing groove is formed in the force exerting handle, indicating scales are arranged on the edge side of an opening in the upper end of the handle containing groove in the upper surface of the force exerting handle, and a blade installation assembly is clamped in the handle containing groove and provided with a trimming blade. The trimming pressing plate is provided with a blade clearance groove corresponding to the trimming blade; when the colloid base plate of the ostomy bag needs to be trimmed, the trimming blade protrudes out of the