This study conducted laser-MAG hybrid welding on 12 mm thick AH36 high-strength steel without beveling. The influence of the distance between the laser and the wire on weld bead formation was investigated, and high-speed photography was used to observe and analyze the behavior of droplet transfer and molten pool flow during the welding process. The results show that as the distance between the laser and the wire increases, the coupling effect of the two heat sources gradually weakens, the molten pool in the keyhole area gradually separates from the arc action area, the keyhole becomes unstable, and the flow behavior of the molten metal fluctuates significantly. When DLA (Distance between Laser and Arc) is 4 mm, the best weld bead formation is achieved; when DLA is 0, 2 mm, the weld has defects such as spatter and undercut; when DLA is 6, 8, 10 mm, the weld formation has defects such as depression, porosity, and hump. As DLA increases from 0 mm to 10 mm, the frequency of short-circuit transition first decreases and then increases, and the laser′s hindrance effect on the jet transition gradually weakens until it disappears.