Steam turbine shaft system center measuring device

The utility model relates to the technical field of steam turbine maintenance, and particularly discloses a steam turbine shafting center measuring device which comprises a gauge stand fixing assembly, a supporting piece, a scale fixing piece and a scale, the gauge stand fixing assembly comprises two clamping plates, a fixing rod and a first fastening piece, the two clamping plates are provided with first through holes matched with the fixing rod, and the first fastening piece is provided with a second through hole matched with the fixing rod. The clamping plates are arranged on the fixing rod in a sleeving mode through the first through holes, the two clamping plates are vertically distributed in a spaced mode, one clamping plate is fixed relative to the fixing rod, and the other clamping plate can slide relative to the fixing rod and can be fixed through a first fastener after sliding in place. The supporting piece is connected to the fixing rod, and the height from the supporting piece to the bottom of the