A circular wall formwork allowing variable radii.Comprises of small,stackable parts and practical in radius alignment. Renders circular, elliptical, conical concrete surfaces without vertical kinks.(discontinuities) Cold formed steel profiles or H20 wooden beams are screwed to surface plywood. Horizontal waler modules are adjustable to curvatures.They also provide support to tierods and push-pull props. Connections of panel modules are rigid and watertight.