The laser-MAG hybrid welding of 08Cr19Mn6Ni3Cu2N with low nickel and nitrogen content was carried out using 92% Ar+8% N2and 95% Ar+5% CO2 as shielding gas. The mechanism of the effect of shielding gas on the microstructure and properties of the welded joint was investigated. The results show that the average microhardness of the weld decreases with the addition of nitrogen, the welding spatter increases with the increase of arc volume and the decrease of arc stability, and the ferrite content in the weld decreases from 14.1% to 10.9% , the ferrite Dendrite also became finer and the secondary dendrite arm became shorter. There are only a few phases and two phases in the weld, and no phases and nitrides are found. The size of austenite grain decreases with the addition of nitrogen from four crystal planes.