Form support for haunched wall of basement

The utility model relates to a form support for a haunched wall of a basement and belongs to the technical field of building constructions. The form support comprises a vertical main wall grid rebar. The vertical main wall grid rebar is arranged at the bottom of a reserved wall. An oblique rebar corresponding to the haunched wall is arranged on the lower portion of the rigid rebar. Fastening screws are respectively and fixedly welded on the oblique rebar at intervals and further perpendicular to the same. Vertical forms are respectively clamped with both sides of the rigid rebar and fixed by dragging nuts which are respectively distributed at two ends of horizontal dragging bolts. The horizontal dragging bolts are disposed at intervals and respectively penetrate the vertical forms. A haunched form is arranged on the oblique rebar and fixed by fastening nuts which are respectively distributed at the fastening screws. The fastening screws are disposed at intervals and respectively pass through the outside surfa