Magnesium hydride is suitable as a hydrogen storage alloy material because of it has a high hydrogen storage capacity of 7.5 wt% and is a light weight metal, low cost metal. But magnesium hydride is limited for practical use because of its higher temperature and slower rate of hydrogen absorption/desorption. Thus, a catalyst is required to improve the kinetic. BZY (BaZr0.8Y0.2O3-δ) as proton conducting ceramics are expected as catalyst to be a good influence on the kinetics of hydrogenation behavior. In this study, we prepared MgH(x)-BZY composites using Mechanical Alloying (MA). BZY powder, prepared by the sol-gel method was added to Mg hydride. The fabricated MgH(x)-BZY composites were characterized by XRD, SED, EDS, TG/DSC and BET. The hydrogenation behaviors were evaluated using a Sievert's type automatic PCT apparatus at various temperature and pressure. As a result, the BZY composites used as a catalyst are expected to have a positive influence on hydrogenation behavior.