Laser welding with filler wire is a widely used welding technology. In view of the disadvantages of the welding technology with side wire feeding,a new method of coaxial wire-feeding is put forward based on an annular laser beam. The welding experiments have been done with the self-design internal coaxial wire feeding welding equipment. The results show that the coaxial wire feeding welding technology has prominent advantages on many aspects,such as stability of coupling between beam and wire,symmetry of heat resource,and optimization of energy distribution. The welding seam surfaces are smooth and flat and their cross sections are symmetrical. The property of isotropic quality is suitable for one-dimensional and multi-dimensional welding. Through altering of laser power,scanning speed,and wire feeding speed,a set of optimal process parameters have been obtained. The results of scanning electron microscope (SEM) analysis and tensile test show that the welding seam produced by this new method has excellent microstructure which is very dense without pores and impurities. Moreover,the metallurgical bonding between welding seam and substrate is very strong and has no obvious flaws.