The invention discloses a stack column type filling formwork and a using method thereof. The stack column type filling formwork is arranged below a top plate, supporting frames spliced together define a cuboid frame structure on the periphery, single supporting frames or integrated bodies formed by single-side-spliced supporting frames are arranged on the two opposite faces of the formwork respectively, and every two adjacent faces are formed by perpendicularly splicing supporting frames at the edges. Each supporting frame is composed of a baffle, framework sleepers and counter-pulled anchor ropes, wherein the framework sleepers are composed of a plurality of parallel transverse sleepers and three parallel vertical sleepers, the transverse sleepers and the vertical sleepers are arranged in a perpendicularly crossing mode, and the counter-pulled anchor ropes are arranged on the vertical sleepers in the formwork center on each side. The framework sleepers make direct contact with the top plate after being spliced to support the top plate. A filling opening is formed in the upper portion of the part, on one side of the formwork, of the baffle. After filling of the formwork, the overall compressive strength of filling columns is improved, the later compression amount of the filling columns is reduced, and the top sinking amount is reduced.