The invention relates to a device for improving anti-pull bearing performance of spherical hinge bearing nodes. The device is applied to the supporting of a large-span roof structure, and comprises asteel column, a spherical hinge bearing and a welding ball which are sequentially connected from bottom to top, the roof structure is connected with the spherical hinge bearing through the welding ball, and the roof structure is supported on the lower steel column through the spherical hinge bearing; anti-pull steel pull rods are arranged around the steel column and the spherical hinge bearing, the upper ends of the anti-pull steel pull rods are connected with the welding ball through connecting anchorage plates, the lower ends of the anti-pull steel pull rods are anchored at box-shaped brackets on the side faces of the supporting steel column, and prestress is established by the anti-pull steel pull rods in a lower end tensioning manner. By means of arranging the anti-pull steel pull rods, anti-pull bearing performance and angular displacement resistance of the nodes are effectively improved.