A　new　model,　Chou　model,　for　predicting　the　fraction　of　hydriding　reaction　in　La(Fe,　Si)(13)　compounds　was　studied.　This　model　is　simple　and　practical,　which　offers　the　fraction　of　hydrogen　absorption　as　a　function　of　time　and　temperature　explicitly.　The　basic　principle　and　reaction　mechanism　of　hydrogen　absorption　of　alloy　materials　are　briefly　introduced.　Besides,　the　＂characteristic　absorption　time＂　as　a　new　concept　has　been　introduced,　which　directly　reflects　the　hydrogen　absorption　rate　of　the　alloy.　The　shorter　the　characteristic　absorption　time　is,　the　faster　the　hydrogen　absorption　rate　is.　Chou　model　quantitatively　explores　the　hydrogen-absorbing　reaction　characteristics　of　La0.7Pr0.3Fe11.5Si1.5　and　La0.7Pr0.3Fe11.5Si1.5C0.2　alloys.　At　the　same　time,　the　change　of　temperature　also　affects　the　hydrogen　absorption　characteristics　of　the　alloys.　The　relationship　between　the　fraction　of　hydrogen　absorption　and　the　temperature　is　obtained　by　the　model　equation,　indicating　that　the　higher　the　temperature,　the　shorter　the　characteristic　absorption　time,　and　the　faster　the　hydrogen　absorption　rate　of　the　alloys,　which　is　consistent　with　the　experimental　results.