The invention relates to the field of machining equipment, in particular to a movable clamping working table for round steel machining. The movable clamping working table comprises a table top, a rotating table, a two-way lead screw and a movable bracket, the upper surface of the table top is rotationally connected with the rotating table, a sliding groove is formed in the upper surface of the rotating table, the two-way lead screw is mounted inside the sliding groove, the outer side wall of the rotating table is fixedly connected with a clamping motor, the movable bracket sleeves the two-waylead screw, a guiding groove is longitudinally formed in the side wall of the movable bracket, a lifting lead screw is arranged in the guiding groove, a lifting block sleeves the lifting lead screw, and a clamping mechanism is mounted on the side wall of the lifting block. By arranging the two-way lead screw and the movable bracket, the end of round steel is clamped by a clamping plate to completeclamping action, the clamping speed is high, the working efficiency is greatly improved, by arranging the lifting block and the lifting lead screw, the height of the round steel can be adjusted according to the actual machining needs, and by arranging universal wheels capable of rising and falling, the movable clamping working table can be conveniently pushed to move.