The invention discloses a bolt-sphere joint mounting method. The bolt-sphere joint mounting method comprises the steps that a sleeve is arranged on a thread rod in a sleeving mode first, then inserting pins are inserted into inserting holes in the sleeve in the radial direction of the sleeve, the inner ends of the inserting pins are inserted into inserting grooves in the thread rod, and the frontend of the thread rod is in threaded connection with a bolt sphere by rotating the sleeve; and the bolt-sphere joint mounting method further comprises the following steps that a, in the step that thefront end of the thread rod is in threaded connection with the bolt sphere by rotating the sleeve, a spacer for inspection of a bolt-sphere joint is arranged on the thread rod in a sleeving mode firstto make the spacer be assembled between the bolt sphere and the sleeve; and b, after assembling of the bolt-sphere joint is finished, whether assembling between the sleeve and the bolt sphere is qualified or not is judged by pulling the spacer to judge whether moving can be generated or not. The bolt-sphere joint mounting method has the advantages that full inspection can be conveniently conducted on the bolt-sphere joint, operation using by workers can be convenient, the working efficiency of inspection can be improved, and the labor intensity is reduced.