Abstract: The change of resistance of amorphous alloy film(Fe_0.4Ni_0.2Cr_0.4)₇₂Si₂₈ with temperature ranging from 20 to 620℃ and the relationship of this change with phase composition and non-crystallinity of this film were determined. The temperature coefficient of resistance with tempering temperature and its relationship with non-crystallinity was studied. The influence and principles of Si content in this film to TCR value was disscused. The change of resistance of amorphous alloy film(Fe_0.4Ni_0.2Cr_0.4)₇₂Si₂₈ with temperature ranging from 20 to 620℃ and the relationship of this change with phase composition and non-crystallinity of this film were determined. The temperature coefficient of resistance with tempering temperature and its relationship with non-crystallinity was studied. The influence and principles of Si content in this film to TCR value was disscused.