Magnetic　refrigeration　materials　based　on　magnetocaloric　effect　(MCE)　attract　wide　attention.　In　the　past　decades,　magnetic　materials　with　MCE　have　been　extensively　studied　due　to　their　enormous　potential　applications　in　magnetic　refrigeration　fields.　Among　these　materials,　La(Fe,　Al)(13)　compound　is　perceived　to　be　one　of　the　promising　candidates　as　high-performance　magnetic　refrigerant　because　of　its　giant　magnetic　entropy　change,　tunable　Curie　temperature,　low　cost　and　toxin-free.　For　LaFe13-xAlx　compounds,　previous　studies　showed　that　the　T-C　can　increase　by　substituting　Co　for　Fe,　which　leads　to　the　value　of　maximum　magnetic　entropy　change　(-Delta　S-M)　decreasing.　In　addition,　the　interstitial　atom　(N,　H,　C　and　B)　can　cause　the　lattice　to　expand,　which　shifts　the　anti-ferromagnetic　(AFM)　ground　state　to　the　ferromagnetic　(FM)　state.　The　T-C　increases　with　doping　the　interstitial　atoms,　accompanied　by　a　remarkable　change　in　the　magnetic　properties　related　to　the　magneto-volume　effect.　In　this　paper,　the　magnetic　properties　and　the　magnetocaloric　effects　of　LaFe11.Al-5(1).H-5(x)　(x　=　-0,　0.12,　0.6　and　1.3),　LaFe11.5Al1.5By　(y　=　0.1,　0.2　and　0.3)　and　LaFe11.5Al1.5Cz　(z　=　0.1,　0.2,　0.3,　0.4　and　0.5)　intermetallic　compounds　are　studied.　The　H,　B　or　C　atoms　are　inserted　into　the　LaFe11.5Al1.5　compounds　by　gas-solid　or　solid-solid　reaction.　All　the　compounds　crystallize　into　the　cubic　NaZn13-type　structure.　The　magnetic　ground　state　changes　from　the　AFM　to　the　FM　state　due　to　the　introduction　of　interstitial　atoms.　Unlike　the　patent　compound　LaFe11.5Al1.5,　all　of　the　hydrides,　borides　and　carbides　display　a　typical　FM　state,　which　easily　reach　saturation　under　a　magnetic　field　of　1　T.　In　addition,　the　saturation　magnetization　(M-S)　slightly　increases　and　the　Curie　temperature　(T-C)　significantly　is　enhanced　with　increasing　the　interstitial　atom　(H,　B　or　C)　content.　It　is　attractive　that　the　magnetic　transition　changes　from　the　second-order　to　the　weakly　first-order　with　increasing　hydrogen　content,　which　is　in　contrast　with　the　magnetic　transition　from　the　weakly　first-order　to　the　second-order　with　increasing　boron　or　carbon　content.　All　the　compounds　of　LaFe11.5Al1.5　hydrides,　borides　and　carbides　exhibit　a　considerable　magnetic　entropy　change.　The　values　of　maximum　magnetic　entropy　change　(-Delta　S-M)　reach　12.3　J/kg.K　for　LaFe11.5Al1.5H1.3,　9.6　J/kg.K　for　LaFe11.5Al1.5B0.1　and　10.8　J/kg.K　for　LaFe11.5Al1.5C0.2　under　a　magnetic　field　change　of　0-5　T,　respectively.　And　the　values　of　refrigerant　capacity　(RC)　reach　259.2　J/kg　for　LaFe11.5Al1.5H0.6,　116.4　J/kg　for　LaFe11.5Al1.5B0.1,　and　230.4　J/kg　for　LaFe11.5Al1.5C0.1　under　a　magnetic　field　change　of　0-5　T,　respectively,　indicating　that　LaFe11.5Al1.5H0.6　compound　is　a　promising　candidate　for　magnetic　refrigerants.