The invention discloses a swivel ball joint and a mounting method thereof. The swivel ball joint comprises a lower ball joint and an upper ball joint arranged above the lower ball joint, wherein a positioning pin hole is formed in the central position of the upper ball joint; a pin shaft is fixedly arranged on the lower ball joint and rotationally connected into the positioning pin hole; both theupper ball joint and the lower ball joint are arranged in the shape of a circle; the top surface of the lower ball joint is a concave sphere; the bottom surface of the upper ball joint is set to a convex sphere which fits the top surface of the lower ball joint; a plurality of upper anchor bolts are uniformly arranged on a support of the upper ball joint; a plurality of lower anchor bolts are uniformly arranged on a support of the lower ball joint; and the upper anchor bolts and the lower anchor bolts are symmetrically arranged. By the adoption of the swivel ball joint disclosed by the invention, the defect that a conventional ball joint is complex to mount and difficult to position can be overcome; the high-efficiency, high-precision and high-quality mounting of the swivel ball joint canbe achieved; and the smooth swiveling can be ensured.