Measuring tool and measuring method for precise revolving body type thin-walled workpiece

The invention relates to a tool and a method for measuring a precise rotary thin-walled workpiece. The tool comprises a base, a gauge support, a locking screw, a sliding block, a measuring rod, a first fastening nut, a second fastening nut and a lever dial indicator. The lower end of the base is a measurement reference surface; the meter support is vertically connected to the upper end of the base. A meter side head extending groove and a sliding block mounting groove are respectively formed in the left side and the right side of the meter bracket on the base; the locking screw is installed in a locking screw installation hole in the meter support in a penetrating mode, the left end of the locking screw is fixedly connected with the bottom of a meter base of the lever dial indicator, the right end of the locking screw is connected with the first locking nut, the lever dial indicator is vertically fixed to the left side of the meter support, and a meter measuring head of the lever dial indicator stretches out