X70 pipeline steel is widely used in long-distance transportation pipelines of oil and natural gas, with advantages such as high strength, high impact toughness, low ductile brittle transition temperature, strong resistance to hydrogen induced cracking, and good welding performance. Due to the large distance span and harsh service environmental conditions of pipeline steel, there are situations such as hydrogen induced cracking, stress corrosion cracking, and welding joint failure, which require frequent repair. Therefore, this article conducts repair experiments on X70 pipeline steel using laser cladding technology, and studies the optimal process parameters for repairing X70 pipeline steel using laser cladding technology through orthogonal experimental design. By observing the metallographic structure of the sample, the influence of process parameters on the mechanical properties of X70 pipeline steel is studied, providing data support for subsequent multi-layer and multi-channel laser cladding repair of X70 pipelines. Orthogonal experimental analysis showed that under the equipment conditions of zero defocus, protective gas flow rate of 15 L/min, and carrier gas flow rate of 8 L/min, the optimal process parameters were laser power of 800 W, powder feeding speed of 8 r/min, and scanning speed of 6 mm/s.