Crystal　structure　and　magnetic　properties　have　been　studied　for　bulk　MnFePSi　compounds　prepared　by　the　spark　plasma　sintering　method.　The　effect　of　Si　content　on　the　crystal　structure　and　the　magnetic　properties　of　the　compounds　were　investigated.　The　MnFePSi　compounds　crystallize　in　a　hexagonal　Fe2P-type　structure　without　obvious　secondary　phase.　Magnetic　measurements　indicate　that　the　compounds　undergo　a　ferromagnetic　to　paramagnetic　first-order　transition　near　their　Curie　temperature　(T-C).　With　the　increase　in　Si　content,　the　T-C　rises　from　343　to　381　K,　while　Delta　T-hys　decreases　simultaneously　from　27　to　15　K.　For　MnFeP0.5Si0.5　compound,　the　magnetic　entropy　change　(-Delta　S-M)　for　a　magnetic　field　change　from　0　to　3　T　is　12　J/kg　.　K,　demonstrating　its　good　potential　for　practical　application.