Various metals, such as uranium and plutonium, have the potential to form hydride phases while environment develop so that they are exposed to low standard of hydrogen in a long time storage environment. The generation of hydride phases has safety implications, for instance the potential to cause unintended thermal excursions and to adversely alter mechanical properties. So the reaction of alloys between hydrogen is of signi?cant industrial interest. The hydrogenation kinetics characteristics of Ce-La alloys have the similarity with some actinide materials. Investigating the growth kinetics of Ce-La alloy hydride reaction sites is of fundamental importance to the development of predictive model of hydriding behavior. In this work, the effect of La content (0~10%, mass fraction) on hydriding kinetics of Ce-La alloys was studied by pressure consume curve, and the effects of La content on surface morphology and oxidation film structure of Ce-La alloy were observed by in situ OM, XRD and Raman spectra. The results show that doped La can shorten the induction period and accelerate the nucleation rate, so as to accelerate the hydriding rate. Furthermore, doped La can cause the lattice expansion and promote the formation of oxygen vacancy in the oxidation film. The apparent activation energies of pure Ce and Ce-10La alloy are 51.12 and 41.53 kJ/mol, respectively, suggesting that the diffusion barrier of hydrogen in the oxidation film of Ce-10La alloys is lower. The oxygen vacancy and the lattice expansion caused by doped La may promote the diffusion ability of hydrogen in the oxide film. Hydrogen diffusion through the oxide film decides the hydriding rate. So doped La accelerate the hydrogenation.