Electrolytic hydrogenation was carried out on two kinds of newly developed zirconium alloy (SZA-4 and SZA-6) tubes, and the effects on the hydrogen absorption properties and mechanism were investigated. The results showed that the hydrogen absorption tendency of SZA-4 alloy was higher than that of SZA-6 alloy under the as-received condition, while, after the recrystallization annealing, the hydrogen absorption tendency of SZA-4 alloy reduced, and the hydrogen absorption tendency of SZA-6 alloy increased. As a result, the hydrogen absorption tendency of SZA-6 alloy was higher than that of SZA-4 alloy, and both of them have a higher hydrogen absorption tendency than that of the traditional Zr-4 alloy. The changes of the hydrogen absorption tendency of SZA-4 and SZA-6 zirconium alloys were related to the precipitation of SPPs. A large amount of (Zr,Nb)2Fe SPPs precipitated with fcc crystal structure in the SZA-6 alloy after recrystallization annealing lead to the hydrogen absorption tendency increasing.