Hydrogen (H2) is released by the manufactured materials, which results in the deterioration of the insulation performance of liquid hydrogen (LH2) storage tanks. The getter is found in the vacuum annular space of equipment and helps maintain the high vacuum of LH2 tanks. Palladium oxide (PdO), an effective H2 getter, is expensive, resource–constrained and unsuitable for the LH2 equipment. Therefore, suitable and inexpensive alternatives were examined using LH2 storage tanks, to maintain the insulation property of the high–vacuum variable–density multilayer insulation (VDMLI) equipment better. Eight types of H2 getters were designed using in the LH2 tanks, and classified into three categories, namely, chemical, physical and physico–chemical getters (PCNHG). The sorption performance of new H2 getters was compared with that of PdO. PdO could be replaced by in the 7:1, 5:1 and 4:1 ratio by PCNHG1, PCNHG2 and CNHG in the LH2 tanks, respectively. The results demonstrated that the sorption capacity of PCNHG1 and PCNHG2 were 1.70 and 2.14 times that of the same type of getters in the market (16.35% and 20.62% higher than that of PdO, respectively). Their average H2 sorption efficiency was 1.17 times and 1.05 times of that of PdO, respectively. The minimum thermal conductivity exhibited by CNHG was only 6.34% of that of PdO, and the sorption capacity of CNHG was 1.82 and 1.44 times that of PCNHG1 and PCNHG2, respectively. However, the sorption capacities of PCNHG1, PCNHG2 and CNHG were belows that of PdO. These results help facilitate reduction in the expense of H2 getters and provide an important reference to enhance the sorption performance of getters.