Mechanical maintenance and correction device

The utility model discloses a mechanical maintenance and correction device which comprises an installation cylinder, a laser pen is embedded in the position of a center shaft at the left end of the installation cylinder, a leaning flat ring is fixedly installed on the left side of the installation cylinder, and a clamping assembly is arranged on the left side of the installation cylinder. The clamping assembly comprises a mounting groove formed in the left side of the mounting cylinder, and a clamping jaw is arranged in the mounting groove. When the mechanical maintenance and correction device is used in the later period, the clamping jaws are inserted into a shaft hole of a rear installation part, the leveling ring is used for leveling, the adjusting screw rod is rotated to enable the extrusion circular truncated cone to abut against the inclined plate, the three clamping jaws synchronously move outwards to abut against the shaft hole, and at the moment, the laser pen coincides with the central axis of the s