Air hole plate ruler for assisting in detecting fabric density

The utility model relates to the technical field of detection devices. The pore plate ruler comprises a plate ruler body, the plate ruler body is provided with a first pore area and a second pore area, the first pore area is provided with a plurality of pore groups, each pore group is provided with at least one first pore, and the number of the first pores of the plurality of pore groups is increased progressively; a plurality of second air holes are formed in the second air hole area at intervals, and the inner diameters of the second air holes are increased progressively; positioning blocksare arranged at the two ends of the board ruler body, concave positions are arranged at the two ends of the board ruler body, the positioning blocks are provided with first magnets, and the concave positions are provided with second magnets. The fabric density detection device is provided with a plurality of air holes and air holes with different inner diameters, so that a diversified fabric density detection function is