The surface nanocrystallization of amorphous Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 radiated by CO_2 laser was studied by means of Mssbauer spectroscopy, transmission electron microscope and X-ray diffraction. The result shows that under certain technical conditions, nanocrystalline is formed on the surface of amorphous Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 radiated by laser; the crystallization phase is α-Fe(Si) crystalline, and its size is about 10-20 nm; the nanocrystalline is uniformly distributed on amorphous base to keep the amorphous and crystallized phase in balance; the amount of crystallization reaches 23% when the laser power is 300 W, the diameter of light spot is 20 mm, and the radiation speed is 20 mm/s. The phase balance can be controlled by adjusting the laser technology parameter. Laser radiation on the amorphous Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 alloy is an important technique for surface nanocrystallization of the amorphous alloys. The surface shows nanocrystallization of amorphous Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 radiated by CO_2 laser was studied by Mssssbauer spectroscopy, transmission electron microscope and X-ray diffraction. The result shows that under certain technical conditions, nanocrystalline is formed on the surface of amorphous Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 radiated by laser; the crystallization phase is α-Fe (Si) crystalline, and its size is about 10-20 nm; the nanocrystalline is uniformly distributed on amorphous base to keep the the amount of crystallization reaches 23% when the laser power is 300 W, the diameter of light spot is 20 mm, and the radiation speed is 20 mm / s. The phase balance can be controlled by adjusting the Laser technology parameter. Laser radiation on the amorphous Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 alloy is an important technique for surface nanocrystallization of the amorphous alloys.