Abstract: Resistance spot welding was utilized in the welding of GH3030 nickel based superalloy alloy with different thicknesses of 1.0 mm and 0.55 mm. The influence of welding current on the macroscopic morphology, interface microscopic characteristics, tensile shear force and fracture forms of the joints was explored. The results indicate that when the welding current is 2.2 k A, the surface of the spot welded joint has good formation, shallow surface indentation and no electrode adhesion phenomenon. The bonding interface formation of the spot welding joint is complete, without deep bonding line,shrinkage cavity, martensite structure accumulation at the edge of fusion zone, etc. As the welding current increases, the tensile shear force of the joint shows a trend of first increasing and then decreasing. The maximum tensile shear force is 2.74 kN. The fracture position of the joint occurs at the edge of the fusion zone. There are three types of fracture in spot welded joints: tearing along the bonding interface, local adhesion tearing in the fusion zone and "button shape" tearing at the edge of the fusion zone.