Abstract: The paper deals with the results on processing parameters of laser transformation hardening and laser surface melting for HT300 camshaft of motorcycle by using(L934) orthogonal experiment.The results show that the two processing methods provide different characteristics respectively,which adopt to different practical technology requirement of camshaft surface.The analysis of structure with/without laser strength treatment and comparative tests of abrasive resistance measurement for sample HT300 prove that the surface hardness and wearability by laser strength treatment are better than chilling treatment.The experimental results provide a basis to improve the surface properties of components.