The invention provides a concrete structure formwork early-dismantling flat-adjustable top support achieving universal rotation of a bracket. The early-dismantling flat-adjustable top support comprises a screw, the bracket, an active plate, a bolt part, two adjusting nuts and an early-dismantling support; the active plate is arranged on the bracket; the bracket comprises a support plate and a short cylinder, the center of the support plate is provided with a through hole, the interior of the short cylinder is a hemispherical bowl surface, the upper end of the short cylinder is provided with a convex ball torus, the center of the convex ball torus is provided with a second through hole, and the upper end of the short cylinder is fixedly connected with the bottom face of the support plate; the lower surface of a screw cap is a spherical surface; the top of the screw is fixedly connected with a semi-circle ball, the top of the semi-circle ball is provided with a bolt hole, and the screw and the bracket penetrate through the first through hole and the second through hole and are screwed into the bolt hole for locking and limiting to form a ball joint through a bolt of the bolt part. According to the concrete structure formwork early-dismantling flat-adjustable top support achieving the universal rotation of the bracket, flatting of the top support for a formwork support system can be achieved, and the construction quality of the concrete structural surface on the position of the top support is guaranteed.