Collecting ring turning tool

The utility model belongs to the technical field of water-turbine generator sets, and particularly relates to a collecting ring turning tool which comprises a supporting frame and a dial indicator arranged on the supporting frame, the supporting frame comprises a base and a dial indicator frame arranged on the base, and one side of the dial indicator frame is connected with the dial indicator. The dial indicator is movably connected with the dial indicator frame through the dial indicator seat, so that the dial indicator is arranged on the dial indicator frame, and a magnetic connecting piece for fixing the base on equipment is arranged below the base. The base is in magnetic connection with equipment through the magnetic connecting piece so as to fix the supporting frame, compared with existing welding fixation, magnetic connection disassembly and assembly are simpler, the supporting frame can be rapidly installed on the equipment or rapidly disassembled from the dial indicator frame, a lot of welding worklo