Digital instrument for measuring furrow

The utility model discloses a digital instrument for measuring furrow used for measuring length and geometric size, composed of a fixed ruler, a movable ruler, an LCD (liquid crystal displayer), etc., and particularly used for the measurement of the depth and the width of the inner circle furrow of a workpiece and the measurement of the workpiece whose measuring value is difficult to directly read. The utility model is characterized in that the displacement quantity of the fixed ruler and the movable ruler can be directly displayed through the LCD, and the measuring value can be separately displayed when the workpiece whose measuring value is difficult to directly read is measured. The measuring pawls of the fixed ruler and the movable ruler have various forms, and the measurement request of complex work can be met. The utility model can be used for measuring absolute values and relative values, having the advantages of high precision and convenient operation.