Mother roll slitting mechanism of diaphragm slitting machine

The utility model relates to the technical field of diaphragm slitting, in particular to a diaphragm slitting machine mother roll slitting mechanism which comprises a slitting machine rack, sliding rails are arranged on the two sides of the slitting machine rack, a knife rest sliding mechanism is arranged above the sliding rails in a sliding mode, the knife rest sliding mechanism comprises a sliding bearing, a sliding plate and a slitting assembly, the sliding bearing is arranged on the sliding rails in a sliding mode, and the slitting assembly is arranged on the sliding plate. The sliding plate is fixedly arranged at the upper end of the sliding bearing, and the slitting assembly is arranged at the front end of the sliding plate. The slitting assembly is arranged on the slitting machine rack in a sliding mode, when the slitting size of a film mother roll needs to be changed or an abraded cutter needs to be replaced, only the slitting assembly needs to be slid to the front end of the slitting machine rack, an