Microstructures and hydrogen absorption and desorption properties of (V60Ti22.4Cr5.6Fe12)100-xMnx (0≤x≤3) alloys made from FeV80 master alloy were investigated systematically. XRD and PCT testing results show that lattice parameter decreases, and plateau pressure increases first and then decreases with the increasing of Mn content. Meanwhile, as the Mn content increases , the hydrogen absorption capacity decreases, but the desorption capacity varies a little .When the Mn content reaches 2.5at%, the plateau pressure of hydrogen desorption reaches a maximum of 0.14 MPa at room temperature, while the hydrogen absorption capacity is 3.64wt% and the hydrogen desorption capacity is 2.00wt%. SEM and EDS analysis show that all of the alloys consist of bcc main phase, Ti-rich phase and rare earth oxide phase. Mn is mainly distributed in the bcc main phase, and only a small amount of Mn exists in the Ti-rich secondary phase.