Cutting mechanism of circular sawing machine

The utility model relates to the technical field of circular sawing machines, in particular to a cutting mechanism of a circular sawing machine, which comprises a cutting assembly and a lifting assembly, the cutting assembly is provided with a first rotating shaft rotationally connected with the circular sawing machine. A servo motor, a transmission assembly and a screw rod are arranged on the fixed seat; the screw rod is sleeved with a nut; the lifting assembly further comprises a sliding strip connected with the fixing base in a sliding mode. The sliding strip is connected with the nut; thesliding strip is hinged to the cutting assembly. The screw rod is driven to rotate through the servo motor and the transmission assembly, so that the nut moves up and down on the screw rod, and meanwhile the sliding strip is driven to slide up and down along the fixing base. Therefore, the cutting assembly can rotate upwards or downwards in the rack of the circular sawing machine with the first rotating shaft as the cente