Crystal　structure,　and　thermal　and　magnetic　properties　have　been　studied　for　bulk　MnFePSiGe　compounds　with　different　silicon　contents　prepared　by　the　spark　plasma　sintering　method.　The　MnFePSiGe　compounds　crystallize　in　a　hexagonal　Fe2P-type　structure　without　obvious　secondary　phase.　The　compounds　undergo　a　ferromagnetic　to　paramagnetic　first-order　transition　near　their　Curie　temperature　(T-c).　With　increase　of　Si　content,　both　T-c　and　magnetic　entropy　change　(-Delta　S-M)　of　the　compounds　rise　remarkably,　while　the　thermal　hysteresis　(T-hys)　remains　almost　invariant.　For　MnFeP0.63Si0.26Ge0.11　compound,　the　T-c　and　-Delta　S-M　for　a　magnetic　field　change　from　0　to　2　T　are　318　K　and　27.9　J/Kg　K,　respectively,　and　its　phase　transition　entropy　change　(Delta　S)　obtained　from　DSC　is　32.3　J/Kg　K.　(C)　2013　Elsevier　B.V.　All　rights　reserved.