Auxiliary positioning device for machining inclined hole of special-shaped part

The utility model provides an auxiliary positioning device for machining an inclined hole of a special-shaped part. The auxiliary positioning device comprises a mounting base, a supporting column body, a supporting table and a pressing plate. The supporting column body is a cylinder which is obliquely fixed on the mounting seat and sleeved in a vertical hole of the special-shaped part, meanwhile, the top of the supporting column body is sleeved in an inner hole of the annular plate, and a mounting screw hole is formed in the top of the supporting column body; the supporting table is an annular boss which is fixed to the outer side of the supporting column body and arranged in a vertical hole of the special-shaped part in a sleeved mode, the supporting table and the supporting column body are coaxial, and the upper surface of the supporting table is in contact fit with the lower surface of the annular plate. The pressing plate is pressed on the annular plate, a plurality of pressing bolts are movably arranged