Mechanical drum

The invention provides a mechanical drum. The mechanical drum comprises a main shaft assembly, a locking ring assembly and two turn-up assemblies, wherein the main shaft assembly is sleeved with the locking ring assembly and the turn-up assemblies respectively; the two turn-up assemblies are symmetrically arranged at two sides of the locking ring assembly, and each turn-up assembly comprises a plurality of first turn-up rods, a plurality of second turn-up rods and a driving device; the first turn-up rods are arranged in the circumferential direction of the main shaft assembly at intervals; the plurality of second turn-up rods are arranged in the circumferential direction of the main shaft assembly at intervals; the first turn-up rods and the second turn-up rods are arranged at intervals, and the lengths of the second turn-up rods are greater than those of the first turn-up rods; and the driving device is in driving connection with the first turn-up rods and the second turn-up rods, so that the first turn-up r