The invention discloses a welding ball node of an inhaul cable support saddle for a large-span prestressed chord tension structure, which comprises a reeving steel pipe in the centre of the node. A circular ring baffle plate is welded at one end of the reeving steel pipe, a plurality of steel ball reinforcing steel plates welded around the reeving steel pipe are welded at the back of the circular ring baffle plate, a hollow steel ball clack is welded between the adjacent reinforcing steel plates, and all the hollow steel ball clacks form a hollow steel ball; two ends of the hollow steel ball clack are welded with the excircle of the reeving steel pipe, and a pedestal connected with a ball hinging support saddle at the top of a column is welded below the hollow steel ball. The invention also discloses a method for manufacturing the node. The welding ball node has advantages that the production period is greatly shortened and the quality can be ensured; main materials of the welding ball and the steel plate are far cheaper than steel casting material with the same property; the production technique is simple, so the welding ball node has good economy; and the prior products and materials are welded and assembled without sinking mould and casting so that the materials and energy source consumption are correspondingly reduced.