The invention discloses a concrete pouring formwork and a construction method thereof. The concrete pouring formwork comprises a plurality of formwork main bodies which are sequentially connected; theformwork main bodies comprise bases which can be lifted and moved; the bases are fixedly connected with top arching frames located above the corresponding bases through a plurality of upright columns; the two sides of the top arching frames are hinged with side wall arching frames correspondingly; a plurality of detachable jack screws are connected between each side wall arching frame and the upright column closest to the corresponding side wall arching frame; and a plurality of steel templates are spread on the top arching frames and the side wall arching frames. Frame erecting is rapid, nofrequent disassembly or assembly is required, overall movement and moving in place can be carried out, the concrete surface evenness and the appearance size are easy to control, and the labor and timeare saved. Demoulding is rapid, and the demoulding can be completed simply by disassembling the jack screws and lowering the height of the concrete pouring formwork. Environment protection is facilitated, by adopting the construction method, the frame erecting and the demoulding can be carried out without frequently disassembling the concrete pouring formwork or the steel templates, sundries on aconstruction site are few, an operating space is wide, a rod is clear, and civilization construction is facilitated.