The utility model discloses reusable portable scale drill rod measuring equipment in the technical field of water and soil conservation monitoring. The ruler comprises a first ruler body and a secondruler body, one end of the first ruler body is hinged to one end of the second ruler body through a 90-degree limiting ring, a square hole is formed in the center of the 90-degree limiting ring, and one edge of the square hole is parallel to the long edge of the first ruler body or the long edge of the second ruler body. The beneficial effects of the utility model are that: the utility model discloses: the beneficial effect is: Water and soil monitoring, the device is sleeved on a measuring drill rod; according to the device, three fixed image control points can be provided when a slope three-dimensional model is established through non-contact photographing, so that the problem that close-range photogrammetry coordinates are not unified in different periods is solved, the device can be repeatedly used, disposable measuring rods are reduced, manual treading disturbance in the laying and measuring process is avoided, and therefore the monitoring precision is improved.