Positioning device for wide and narrow edges of decorative hole and opening edge of hub and machining method of positioning device

The invention relates to a positioning device for wide and narrow edges of decorative holes and opening edges of a hub and a machining method of the positioning device. The tool comprises a base plane supporting plate, a center positioning seat is arranged on the base plane supporting plate, and the center positioning seat is connected with a positioning core matched with the bottom end of a hub center hole of a hub semi-finished product workpiece; the positioning claw is used for fixing the inner rim of the hub on the base plane support plate; the positioning assembly comprises a side positioning rod penetrating through a spoke window of the hub semi-finished product workpiece, a lower supporting plate connected to the lower end of the side positioning rod and capable of rotating by 360 degrees and horizontally moving along a fulcrum on the base plane supporting plate, and a spherical surface positioning plate movably connected to the upper end of the side positioning rod. The machining precision of the hub