Hole distribution position detection device for flange plate

The utility model discloses a hole distribution position detection device for a flange plate. The hole distribution position detection device comprises a measuring disc, a horizontal measuring rod, a positioning plug and a positioning sheet, the measuring disc is inserted into a center hole of a to-be-measured flange plate through a lower circular plate, the two horizontal measuring rods are sequentially inserted into a positioning column of the measuring disc, the two ends of each horizontal measuring rod are connected with one positioning plug, and the two ends of the lower horizontal measuring rod are positioned with the to-be-measured flange plate through the positioning plugs. The positioning plugs connected with the two ends of the upper-end horizontal measuring rod are inserted into the connecting holes of the outer ring of the flange plate to be measured respectively, and whether the distribution angles of the connecting holes are qualified or not is judged by judging whether the positioning pieces ca