The invention relates to an active variable-stiffness leveling pile and a construction method thereof. A filling pile, on the basis of a reinforced concrete pile body, is provided with a leveling section which is positioned on the upper part of the reinforced concrete pile body and comprises a leveling steel reinforcement cage, a leveling cylinder, an exhaust pipe, a pouring pipe and after-pouring concrete, wherein the leveling cylinder is sleeved on the upper part of the reinforced concrete pile body and consists of a cylinder wall and a clapboard; the leveling steel reinforcement cage is positioned at top of the leveling cylinder and is cast-in-place with a foundation to form a whole body, the exhaust pipe and the pouring pipe are arranged in the leveling steel reinforcement cage; and aleveling longitudinal bar and the pouring pipe extend into the leveling cylinder and are lapped with a longitudinal reinforcing steel bar of the pile, and is cast-in-place with the leveling cylinder,the upper pile body steel reinforcement cage and the after-pouring concrete. The active variable-stiffness leveling pile and the construction method thereof solve the problem that the differential settlement of the pile body under the action of the dead weight of the upper structure causes pile group top surfaces are not at the same horizontal position, and are suitable for the construction of the pile body of the filling pile.