In this paper, crystallization behavior effects oil magnetic property of Fe-based amorphous HB1 alloy alloys were studied. DSC and TGA techniques were used to study the thermal properties, phase formation during primary crystallization and magnetic properties. According to measurement results, the lowest core loss Occurs with an annealing temperature at 360 degrees C, sock for 2 hours and under a DC magnetic field density 800A/m. Finally, at the same specifications and rated power, experimental results of the magnetic loss are presented for the amorphous alloy HB1 core transformer and commercial SA1 core and silicon steel core transformer. It call be seen that the amorphous HB1 core transformer can provide better performance in the aspect of core loss and exciting power.