The laser beams were arrayed in parallel and serial forms and separations of laser beams were varied tounderst and heat flux tendency by multiple focused laser beams. To investigate the effect of various laser heat source, the laser beams were aligned in the horizontal direction(serial array) and vertical direction(parallel array). The spacing between the two laser beams was set at 1mm, 2mm, 4mm, 5mm, 6mm, and 8mm in horizontal direction. In addition, the laser beams were spaced at 2 mm, 6 mm, 8 mm, and 10 mm apart to investigate the distribution in the vertical direction. In the case of 2mm offset, the maximum temperature reached 1343℃, and the temperature difference between the leading and trailing beams was not distinguishable. The maximum temperature reached 1177℃ for the 5mm offset, and 269℃ for the 8 mm offset. It was observed that the maximum temperature continued to rise and converge under the influence of both laser beams. In the case of 10mm offset, the maximum temperature was observed to be 214℃, and the effect of the dual laser beam disappeared. In conclusion, multispot heat distribution on laser welding is an effective welding technique that offers several advantages, including increased welding speed, high weld quality, versatility, process efficiency, and automation capability.