Adjustable umbrella-shaped drilling pile perpendicularity measuring device

The utility model discloses an adjustable umbrella-shaped drilling pile perpendicularity measuring device, and relates to the technical field of building construction measurement. Comprising a central stand column, a plurality of ejector rods, a plurality of supporting rods, a connecting piece and an adjusting piece, the ejector rods are evenly arranged in the circumferential direction with the center of the central stand column as the circle center, one end of each ejector rod is rotationally connected with the central stand column, and the other end of each ejector rod freely extends outwards in the radius direction of the central stand column; the supporting rod is obliquely arranged below the top rod, the upper end of the supporting rod is rotationally connected with the top rod, the lower end of the supporting rod is rotationally connected with the connecting piece, the adjusting piece is rotationally arranged outside the connecting piece in a sleeving mode, and the central stand column is sleeved with t