Bolt-sphere joint with adjustable length

The utility model discloses a length-adjustable bolt-sphere joint, belongs to the technical field of bolt-sphere joints, and solves the problem that the connecting length of an adjusting rod piece of an existing bolt-sphere net rack cannot be adjusted. The bolt ball comprises a bolt ball body, a plurality of annular grooves for containing adjusting sleeves are formed in the surface of the bolt ball body, the depth of the adjusting sleeves entering the annular grooves is adjusted through one-way limiting buckle assemblies, and the one-way limiting buckle assemblies are connected with the adjusting sleeves in a one-way clamping mode. A threaded hole matched with the adjusting rod piece is formed in the position, located at the circle center of the annular groove, of the bolt ball, and a bolt at one end of the adjusting rod piece penetrates through the adjusting sleeve and is in threaded connection with the threaded hole; the one-way limiting buckle assembly and the adjusting sleeve are matched to adjust the con