Abstract: Feasibility analysis of space solar array wire welding was carried out,and welding thermal field,temperature field and stress field were numerically simulated through finite element modeling and simulation. The results show that the welding process of space solar array wire includes the pre-pressing process of surface contact affected by elastic-plastic deformation and the indirect coupling process of electro thermal temperature field and welding stress field. By extracting the numerical simulation results of welding temperature field distribution,the reasonable distribution of welding temperature field can be quickly and intuitively analyzed. The changing trend of welding parameters during welding process provides theoretical support for the engineering application of space solar array wire welding.