The utility model discloses a pressure bearing for a 330kV live line tool. The pressure bearing comprises a bearing jacket and a protective bowl which is connected with the bearing jacket, wherein a groove is arranged under the bearing jacket, thereby forming an upper inner bearing sleeve; the upper inner bearing sleeve is integrated with the bearing jacket; a groove is arranged in the protective bowl, thereby forming a lower inner bearing sleeve; the lower inner bearing sleeve is integrated with the protective bowl; the protective bowl is provided with an adjusting slot for adjusting the combining tightness of the bearing jacket and the protective bowl; a ball bearing is arranged between the upper inner bearing sleeve and the lower inner bearing sleeve; and adjusting bolts are also arranged on the bearing jacket and the protective bowl. The pressure bearing for the 330kV live line tool has the advantages of reasonable structure, uniform stress, durability, safety, reliability, and capabilities of increasing working efficiency and saving maintenance cost.