Structural relaxation kinetics and reversible relaxation processes of amorphous alloys Fe13.3 Ni69.6 B16.2 Si0.9 are discussed in this paper. Changes in the Curie temperature, Tc, due to various heat treatments are studied. It is found that Tc approaches equilibrium values after prolonged annealing, and the relaxation kinetics can be described by the relaxation time spectrum. Relaxation relaxation process can be explained by CSRO, and we note that the reversible change in one property does not imply that the change of entire structure is reversible.