Abstract: The TMCP state AH36 steel plate with thickness of 10 mm is done a hybrid welding with the Laser-MIG Hybrid Welding technology. The effects of laser power, welding speed, arc current, voltage, and wire feed speed on weld formation were analyzed. The optimal welding parameters were found to be: laser power of 6.5kW, welding speed of 12mm/s, arc current of 225A, arc voltage of 24.6V, wire feed speed of 7.6m/min, defocus of -2mm, and inter-wire distance of 3mm. The resulting weld is well formed and free of defects. The results show that the increase of laser power will reduce the residual height of the front of the weld and increase the residual height of the back side. The increase of welding speed will reduce the residual height of the front of the weld, and the back side will not be dissolved; The increase of arc current, voltage and wire feeding speed will increase the residual height of the front of the weld, but have no effect on the forming of the back of the weld. The welds in the arc zone and laser zone consist of bainite, martensite, and ferrite microstructures. The average hardness of the weld in the arc zone is 215 HV, while the average hardness of the weld in the laser zone is 185 HV.