Abstract: Effect of sodium silicate on performances of alkaline low hydrogen electrode is studied. Test results show that increasing the content of sodium silicate in coating of electrode could reduce electrode sleeve length, slag viscosity and tendency of vertical welding nibs, and increase splash slightly, and that the chemical composition and mechanical properties of deposited metal of welding electrodes and content of diffusion hydrogen have no obvious change. Therefore, the welding technicality could be optimized by adjusting content of sodium silicate in the coating of alkaline low hydrogen electrode.