Multi-bar size adjusting mechanism

The utility model discloses a multi-bar size adjusting mechanism. The multi-bar size adjusting mechanism comprises a platform, supporting legs, a screw mounting plate, a screw, a baffle, an adjustingrotating wheel, a stand column, a hydraulic cylinder mounting plate, a hydraulic cylinder, a pressing plate, a cutting machine, a sliding table, a sliding table mounting plate, an arc-shaped groove and scale marks. The device comprises a pressing and fixing mechanism and a cutting mechanism, when a plastic bar is cut, the pressing and fixing mechanism can press and fix the bar, the cutting mechanism can cut the plastic bar, the cutting process does not need to be conducted manually, great convenience is brought to cutting, the device can cut multiple bars at a time, and the cutting efficiencycan be improved; the required cutting length of the bar can be adjusted through the length positioning mechanism, great convenience is brought to cutting, the length positioning mechanism comprises aplurality of screw rods, ea