Abstract： A novel technology of double sided arc welding (DSAW) in which the gas metal arc welding (GMAW) was employed for root welding and filler passes respectively was proposed in this paper. The correction of multilayer path planning based on vision recognition (CMLPPBVR)  was proposed to decrease the accumulated error and increase the precision of path planning. Laser stripe was used to scan the filler condition of the groove after each welding bead was welded. The real time filler information of each welding bead can be obtained through the image processing and 3D information restoration to correct the multilayer path planning, which improves the precision of multilayer path planning.