Accessory for infusion bag

The invention discloses an accessory for an infusion bag. The accessory comprises an accessory tube body and a gasket, wherein the gasket is arranged at the upper part of a tube cavity of the accessory tube body, a pressing ring is fixedly arranged at an upper end opening of the accessory tube body in a welding way, the pressing ring comprises a pressing disc which is used for welding and a pressing leg which is used for pressing the gasket, the pressing leg is arranged at the bottom part of the pressing disc, and the pressing leg stretches in the tube cavity and is pressed on the upper surface of the gasket for pressing and fixing the gasket after the pressing disc and the upper end opening of the accessory tube body are fixedly welded. According to the accessory for the infusion bag, disclosed by the invention, the functions of dosing and infusion can be realized; the integrated structure of the accessory is beneficial for realizing the sealing on the tube body without welding a sealing cover during infusion production, the welding procedures are reduced, and the risk that liquid medicine is polluted by secondary welding can be reduced; by arranging the pressing ring on the gasket, the installation firmness of the gasket is effectively enhanced, and the situation of liquid leakage caused by loosening of the gasket during a using process can be effectively prevented from appearing; the structural design of the product is simple, the mass is light, and a bigger cost advantage is obtained.