The element distribution, the phase structure and the microstructure morphology of C-N-B laser-alloyed layer on 60# steel surface were studied by employing the Auger electrom spectrometer, X-ray diffraetometer and the scanning electron microscope. The results show that the laser alloying of C-N-B surface will give rise to many strengthening effects on the base metal, and the fine metallurgical bonding has been achieved on the surface layer with the substrate. The relation between the properties of alloyed layer and the scanning speed have been discussed.