Backward rotation type water meter tightening machine

The utility model discloses a reverse rotation type water meter tightening machine which comprises a box body, a workbench, a pressing air cylinder, a pressing rod, a pressing screw rod, a pressing disc, a clamping base and a dial plate tightening device. A workbench is arranged on the upper portion of the box body, a pressing air cylinder is arranged on one side of the upper portion of the workbench, a pressing rod is transversely arranged at the upper end of the pressing air cylinder, a pressing screw rod is arranged at one end of the pressing rod, and a pressing disc is arranged on the lower portion of the pressing screw rod. Compared with the prior art, the device has the advantages that the water meter shell can be supported and fixed through the clamping base and the pressing disc, a dial plate can be conveniently installed, the tightening sleeve can tightly support the dial plate all the time through the supporting spring, the dial plate can be conveniently installed and tightened, the dial plate is pr