Shallow seam measuring tool

The utility model publics a shallow seam measuring tool, including a dial indicator, an extension bar and a measuring bar. One end of the measuring bar is provided with a cross-shaped open hollow cone end, and the other end of the measuring bar is provided with an internal screw thread. The cone end is surrounded with a taper ring and a nut, a head of the dial indicator is fixed inside the cone end by using the taper and nut, one end of the extension bar is provided with an external screw thread and is fixed inside a screw end. The dial indicator with a high measuring precision fully meets the needs of measuring precision of a flange. The measuring tool has small volume and convenient to assemble. A shallow seam of the flange is precisely measured by comparing between a reading of the dial indicator and a check data of the dial indicator.