Conical alignment positioning piece and automobile part detection device adopting same

The invention relates to a conical alignment positioning mechanism and an automobile part detection device adopting the conical alignment positioning mechanism, and relates to the technical field of automobile detection tools. The conical alignment positioning mechanism comprises a seat body, a positioning piece and a moving piece; a positioning piece is movably arranged on the seat body, and one end, facing the part positioning hole, of the positioning piece is a conical end; the positioning piece is connected with a moving piece, the moving piece is used for driving the positioning piece to move, and when the positioning piece moves towards the positioning hole, the conical inclined side wall of the conical end can completely block the positioning hole. The conical end is adopted, and the problems that in an existing detection tool, the part, stretching into the positioning hole, of the positioning piece is a fixed-diameter cylindrical pin, a gap is inevitably reserved between the cylindrical pin and the po