Infusion bag joint and manufacturing method thereof and accessory for infusion bags

The invention discloses an infusion bag joint and a manufacturing method thereof and an accessory for infusion bags. The infusion bag joint comprises a welded ring and an infusion tube which are formed integrally, wherein the welded ring is arranged at the upper end of the infusion tube, a through hole running through the infusion tube along the length direction is arranged inside the welded ring and the infusion tube, and the inner wall and the outer wall of the infusion tube are reduced gradually from top to bottom according to the taper degree. The infusion bag joint is simple in structure, easy to form and low in production cost, the appearance of the infusion is designed to be flat prismatic, so that the infusion bag joint can be welded conveniently without special weld ribs and weld tail lugs arranged at the connecting end, sealing effect is achieved while liquid leakage is avoided. In addition, the manufacturing method of the infusion bag joint is simple and includes two steps only, demoulding is easy to implement, production efficiency is high, and production cost is low.