Abstract: Influences of AC frequency,magnetic density and ribbon length on the magnet-inductive effect and the rangeability of magnet-inductive effect of Fe73.5Cu1Nb3Si13.5B9 amorphous alloy ribbons were studied. The results show that the magnet-inductive effect increased with the increase of frequency and ribbon length,and decreased with the increase of magnetic density. The rangeability of magnet-inductive effect increased with the increase of magnetic density. The rangeability of magnet-inductive effect increased with the increase of frequency and ribbon length when the frequency was below 30 kHz. But when the frequency was above 30 kHz,it decreased with the increase of frequency,and first increased and then decreased with the increase of ribbon length.