Abstract: In order to solve the problem of the thermal effect of hydrogen storage in metal hydride, a two-dimensional simulation model of the hydrogen storage reactor was developed, and the influence of adding heat exchange tube bundles in the reaction dead zone on the hydrogen storage performance was studied. The optimal arrangement of the tube bundles in the dead zone of the reactor with different sizes was obtained. Results show that when 15 tubes are added in the dead zone of 45 mm radius reactor, the temperature of the metal hydride in the dead zone decreases from 339 K to 297.6-311.4 K, and the reaction fraction increases from 0.2-0.5 to above 0.89. When the reactor radius is 35, 45 and 55 mm, the optimal number of dead zone tubes is 6, 15 and 18, respectively, which results in a reduction of hydrogen storage time by 8.53%, 9.95% and 9.68% compared with that before optimization. The volume fraction of the tube bundles only increases by 0.49%, 0.74% and 0.60%, respectively, and the maximal variation in hydrogen storage time across reactors of varying sizes is less than 2.43% after optimization. Therefore, the addition of tubes can effectively eliminate the effect of the dead zone on the hydrogen storage.