The invention provides a valve hall pressure equalizing ball with a controllable discharge path and a valve hall of a converter station. The valve hall pressure equalizing ball comprises a ball body and a telescopic device. Wherein the telescopic device is arranged in the ball body, and the telescopic end of the telescopic device protrudes out of the ball body when a person enters the valve hall gap to form a ball electrode defect to guide a discharge path. The invention provides a valve hall pressure equalizing ball with controllable discharge path, the telescopic end of the telescopic deviceis connected to the valve hall when a person enters the valve hall gap, protruding out of the bulb, A ball electrode defect is formed to direct a discharge path such that when a discharge occurs, Ball electrode defects guide the discharge path so that the discharge occurs along a specific path, thus eliminating the unpredictable drawback of the large-scale voltage-equalizing ball discharge path of the converter station, protecting the personnel entering the converter station and preventing the personal safety of the personnel from being hit by the discharge path.