The utility model discloses a trimming device with an auxiliary support, which comprises two groups of shoulder supporting plates, one end of each shoulder supporting plate is connected with a first connecting plate, one end of each first connecting plate is connected with a supporting
assembly, the surface of the supporting
assembly is provided with a supporting rod, one end of each supporting rod is connected with a first adjusting device, and the other end of each supporting rod is connected with a second adjusting device. One end of the first adjusting device is connected with a movable
assembly, the upper end of the movable assembly is connected with a second adjusting device, a screw is installed on the upper surface of the second adjusting device, the outer side of the screw is in threaded connection with an inner threaded cylinder, and the upper end of the inner threaded cylinder is welded to a
pivot joint of the trimming knife. Through the arrangement of the shoulder supporting plate, the first supporting plate, the second supporting plate and the supporting rod, the trimming knife can be supported, the gravity of the trimming knife can be dispersed, and therefore the problem that arms of operators are tired due to long-time
continuous operation is solved.