Referring to the compositions of second phase particles (SPPs) in zirconium alloys, three kinds of experimental Zr(Fe,Cr)2 alloy with different Fe/Cr ratio i.e. Fe/Cr=2 and 0.5 for Zr(Fe,Cr)2 and Fe/Cr=0 for ZrCr2 were prepared. Then the pressure-composition- temperature (P-C-T) curves and kinetic curves of hydrogen absorbing and desorbing were obtained. XRD was employed to analyze the structures of the specimens before and after hydrogen absorbing at 360 oC. Results show that the amount of hydrogen absorption of the three alloys all increases with the decrease of Fe/Cr ratio at 50, 200 and 360 oC. In addition, the amount and rate of reversible hydrogen absorption and desorption of the three alloys all increase with the decrease of Fe/Cr ratio when tested in 360 oC, 4 MPa H2 atmosphere. X-ray diffraction analysis indicates that no hydride is detected after they absorb hydrogen at 360 oC.