The surface morphology, crack section morphology and metallographic structure of Fe-and-Al based eutectics (Fe-Ni-P-B-C, Al-Si, Al-Si-Mg-Mn) before and after treatment with high repetition rate YAG laser light were observed with a scanning electron microscope. The results show that the sample surface irradiated by laser light has been changed into Non-crystalline and the non-crystalline layer possesses higher ductility and better thermal stability.