Abstract: In order to promote the innovative development of welding consumables for X70 pipeline steel and rationally select welding consumables to improve the weldability of steel, the research progress of selection principles of welding consumables for X70 pipeline steel related to engineering applications was reviewed.The results indicate that the main issues with the weldability of the steel are the sensitivity to welding cracks, as well as a certain degree of coarsening and softening of the HAZ grains, while also not neglecting the local embrittlement of the HAZ.The selection of X70 steel welding consumables tends to the principle of "quasi-composition matching", that is, the chemical composition of the weld metal is as close as possible to the base metal, and efforts are made to make the microalloying elements play a positive metallurgical role. The multi-layer composite weld joint made of three kinds of welding consumables, whose microstructure of each layer makes due contribution to the integrity of the joint and the balance of mechanical properties, has comprehensive mechanical properties that meet the technical requirements. The research results provide theoretical reference for the reasonable selection of welding consumables of X70 pipeline steel, the optimization of supporting processes and the improvement of engineering quality.