Portable dense-position ruler

The utility model discloses a portable dense scale which comprises a graduated scale, dense scales are arranged on one long edge of the graduated scale, and a telescopic assembly is connected to the middle of the long edge, not provided with the dense scales, of the graduated scale. An observation column is connected to the end, away from the graduated scale, of the telescopic assembly, an observation ring is connected to the end, away from the telescopic assembly, of the observation column, an observation hole is formed in the middle of the observation ring, and the axis of the observation hole is perpendicular to the surface of the graduated scale when the telescopic assembly is in a stretching state; a first cylindrical level bubble and a second cylindrical level bubble are arranged on the graduated scale, the axis of the first cylindrical level bubble is perpendicular to the long side of the graduated scale, and the axis of the second cylindrical level bubble is parallel to the long side of the graduated