Luffing jib stacker crane slewing platform

The utility model discloses a revolving table of a luffing tower crane, which comprises a balance arm and an upper rotation, wherein an A-shaped rack and a supporting connecting rod are arranged on the upper rotation, the front end of the balance arm is connected on the top point of the A-shaped rack, the bottom of the A-shaped rack is fixedly connected with the upper rotation, and the middle portion of the balance arm is connected on the upper rotation through a supporting connecting rod. Since the supporting connecting rod is added on the rear direction, the length of a suspension arm of the revolving table is reduced, which greatly reduces the maximum bending moment on the main beam of the revolving table, and creates the conditions for reducing the section of a main beam and the weight. Adopting the connecting method, not only the sole weight is reduced, the economy is good, but also the structure service life, the reliability and the safety of the luffing tower crane are improved. The revolving table can be applied on all the newly designed various luffing tower cranes or on the improvement of an original luffing tower crane.