In this essay, take the 5.0 mm thick high strength steel plate as the experimental material, and analyzes the weld shaping, process stability and droplets transfer characteristics of CO2 laser-MAG hybrid welding with different the arc energy. Experimental results show that, when the laser power P=1.6 kW, welding speed v=1.2 m/min, if welding current I<180 A, current voltage U=24 V, or welding current I=180 A, current voltage U<24 V, the transfer mode is short circuit transfer, or globular transfer or transfer mode between short circuit and globular. When welding current I≥180 A, or current voltage U≥24 V. The transfer mode is spray transfer and the weld shaping is more smooth.