The utility model relates to an overlong and steep-slope curtain wall oblique post which comprises an upper straight steel pipe post, a conical steel pipe post body, an obconical steel pipe post foot, a welding ball and steel pipe brackets, wherein the conical steel pipe post body is fixed on the obconical steel pipe post foot; the welding ball is connected with the upper straight steel pipe post and the obconical steel pipe post foot; and the steel pipe brackets are mounted and welded around the welding ball and at the upper part of the upper straight steel pipe post. According to the oblique post, shape torsion of a curtain wall can be achieved by adjusting inclination of the upper straight steel pipe post via the welding ball under the condition of the consistent inclination of the conical steel pipe post body, a unified style of the curtain wall is kept, and the shape of the curtain wall is more varied.