Tower crane and balancing arm

The utility model provides a tower crane and a balancing arm. The tower crane comprises the balancing arm, a tower head, a pull rod base and a plurality of pull rods, wherein the balancing arm comprises a plurality of adjusting sectional arms which are detachably connected with one another; the tower head is connected with the first end of the balancing arm; the pull rod base is connected with the tower head; the pull rod base is connected with two of the pull rods; one end of each adjusting sectional arm is provided with a sectional arm connecting matched part connected with another adjusting sectional arm and a tower head connecting matched part connected with the tower head; and the pull rods are provided with pull rod base connecting matched parts connected with the pull rod base. The utility model further provides the balancing arm in the tower machine. The utility model has the main advantages that the balancing arm is divided into multiple sections, and the arm length is changeable, so a user can select balancing arms with different lengths according to the requirements of the using occasions and the environmental adaptability of the single tower crane is improved; after the balancing arm is divided, transportation of the balancing arm is convenient; the length of the pull rods can be changed along with the change of the length of the balancing arm; and unbalanced stress on the pull rod base caused by the change of the arm length is avoided, so that the pull rod base does not rotate.