The utility model discloses a hydrogenation preservative, include: a body, this body are cylindrical, are provided with in this body footpath centering department to be on a parallel with an axial central through hole, and a week is provided with a plurality of axial supplementary through -holes that are on a parallel with outside this central through hole of this body, this central through hole cross section is circular, and each should be cloverleaf pattern by supplementary through -hole cross section, this central through hole is 0.1-0.9 with the comparing of diameter of these a plurality of supplementary through -hole circumscribed circles. The utility model discloses a hydrogenation preservative has simple structure and better appearance impurity effect.