Local positioning perpendicularity detection device and method

The invention belongs to the technical field of perpendicularity detection, and relates to a local positioning perpendicularity detection device and method.The local positioning perpendicularity detection device comprises a positioning mechanism, a rotating mechanism and a detection unit, the rotating mechanism is arranged on one side of the positioning mechanism, and the detection unit is connected with one end of the rotating mechanism; the positioning mechanism comprises a hole step surface positioning plate, the hole step surface positioning plate is of a fan-shaped structure and is provided with a center hole, and the axis of the center hole coincides with the axis of the mounting hole; the rotating mechanism comprises a central rotating shaft and a bearing outer ring top pressing plate, the central rotating shaft penetrates into the central hole, the bearing outer ring top pressing plate is fixedly connected to the hole step surface positioning plate, and a positioning hole is formed in the bearing oute