We have measured the resistivities of Fe

82

B

18-x

Si

x

（x=2

4

6

8

10）alloys versusthe temperatures by four-terminal potential method to determine the transitiontemperatures from amorphous state to crystalline state.We have studied the de-pendence of the crystallization temperature on the Si content

and investigatedthe hyperfine field distributions of Fe

80

B

20

and Fe

82

B

18-x

Si

x

amorphous alloys atroom temperature by Hesse method.The relations between the mean hyperfinefields and the B

Si concentrations in amorphous Fe

82

B

18-x

Si

x

were shown.Afterfull crystallization the phase structures in Fe

80

B

20

and Fe

82

B

18-x

Si

x

alloys wereanalysed by the spectrum stripping technique.