Fe-based amorphous ribbon is a new structural and functional material with excellent magnetic properties, wear resistance, strength and hardness and so on. Fe78Si9B13 amorphous ribbons were cut by ultraviolet nanosecond laser with 355 nm wavelength. The effects of laser pulse frequency, pulse width and cutting speed on the width of the slit and the width of the heat affected zone were studied. The results show that Increasing the cutting speed can reduce the slit width and the size of the heat-affected zone, and improve the cutting efficiency within a certain range. As the frequency increases, the width of the slit and heat-affected zone decreases. With the increase of pulse width, the width of the slit decreases, but the width of the heat-affected zone increases. The results of thermal analysis showed that some samples were crystallized in the heat-affected area.