Slide gauge

The utility model relates to a measuring tool, being a slide gauge used for the industries, such as machining, etc. The utility model is provided with a main scale 1, an auxiliary scale 2 is installed on the main scale 1, and the scale of the auxiliary scale is 99 millimeters. The scale with the length of 99 millimeters is divided into 100 portions. The length of each small scale on the auxiliary scale 2 is 0.01 millimeter shorter than the scale on the main scale 1 and an internal groove with the length of 50 millimeters is opened on the back surface of the auxiliary scale 2. The utility model can improve the precision of the gauge from the original 0.02 millimeter to 0.01 millimeter, the utility model also has the advantages of convenient use and rapid and accurate reading, and the measuring range is avoided being reduced.