The invention discloses an oversized wall column template support system, and relates to the field of construction engineering. The oversized wall column template support system comprises a plurality of face plates, wood braces, aluminum alloy square tube back fillets and opposite-pull screw rods, wherein an oversized wall column pre-casting space is defined by splicing the plurality of face plates; the face plates are sequentially provided with the vertically arranged wood braces and the horizontally arranged aluminum alloy square tube back fillets in a stacking way; the aluminum alloy square tube back fillets are vertically arranged double-rectangle square tubes; the two ends of the opposite-pull screw rods respectively and sequentially pass through the face plates as well as gaps among the aluminum alloy square tube back fillets, namely, the double-rectangle square tubes and gaskets of the double-rectangle square tubes; the aluminum alloy square tube back fillets comprise front aluminum alloy square tube back fillets and side aluminum alloy square tube back fillets, and the side aluminum alloy square tube back fillets and the front aluminum alloy square tube back fillets are arranged in a staggered intersection way; the opposite-pull screw rods are horizontally and vertically arranged in a uniform way at intervals of 430-480mm. According to the oversized wall column template support system, a light back fillet material is adopted, and a template system structure is reasonably set, so that the quality and safety of construction are guaranteed, and the time and the labor are saved.