Utilizing the low power pulsed laser + TIG hybrid welding on the 2 mm thick stainless steel surfacing welding,investigated the pulsed laser influences on the arc behavior,the weld pool behavior and the weld geometry. The results show that expansion occurs at the center of the arc,and the arc anode is stabilized at the laser spots with the TIG voltage rising slightly at the same time when the pulsed laser acts on arc. In the maintenance phase of the pulsed laser,the molten pool liquid metal flow backwards,the length of molten pool increase significantly. After the pulsed laser disappeared 1 millisecond,the length of molten pool begin to decrease,2 millisecond later the liquid metal reflux forward,resulting in the weld surface formed fish-scale pattern,improved the weld surface. The weld penetration of the hybrid welding is 1.77 times than that of TIG welding and 2.6 times than that of the laser weld,and the speed of hybrid welding can be improved by 50% compared with TIG welding under the same penetration.