在室温下，借助Ｍｏｓｓｂａｕｅｒ谱技术，研究非晶合金Ｆｅ_（８１）Ｐ_（１２）Ｃ_３Ｓｉ_（２．５）Ｃｕ_１Ｍｏ_（０．５）晶化过程中局域结构的变化。发现整个晶化由两个阶段组成：第一个阶段（３００－３６０℃之间退火）为α－Ｆｅ相的形核与长大阶段；第二个阶段主要为Ｆｅ_３Ｐ相的形核与长大阶段。同时该合金在３６０℃退火获得最佳软磁性能。还讨论了软磁性能与结构变化之间的关系。 At room temperature, the Mossbauer spectroscopy technique was used to study the changes of the local structure during the crystallization of amorphous Fe_ (81) P_ (12) C_3Si_ (2.5) Cu_1Mo_ (0.5) It is found that the whole crystallization consists of two phases: the first phase (annealing between 300-360 ℃) is the nucleation and growth phase of α-Fe phase; the second phase is mainly the nucleation and growth of Fe_3P phase stage. At the same time, the alloy was annealed at 360 ℃ for the best soft magnetic properties. Also discussed the relationship between soft magnetic properties and structural changes.