Marking plate used in core box

The utility model belongs to the field of rock core sample containing tools, and particularly relates to a marking plate used in a rock core box, which comprises label paper and a partition plate, a clamping groove is arranged on the lateral side of the partition plate, and the label paper is clamped in the clamping groove. Hanging lugs are arranged at two ends of the top of the clapboard; the bottom edge of the partition plate is of a semicircular structure. When the rock core box is used, the partition plate is hung between two adjacent rock core samples in the same containing groove of the rock core box or at the ends of the rock core samples through the hanging lugs, so that the rock core on the side where the label paper is located is marked, compared with the prior art, the label paper is not prone to falling off and being lost, and meanwhile the label paper is not prone to falling off and being damaged. After the transparent protective sleeve made of plastic is sleeved outside the label paper, the labe