The invention discloses an all position welding low hydrogen type electrode excellent in low temperature impact toughness and for SA-508Gr.4N steel, and relates to the weld material technology field.The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel solves the problems that an existing low hydrogen type electrode for the SA-508Gr.4N steel is poor in low temperature impact toughness and unsuitable for all position welding. The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel comprises a core wire and a coating, wherein the core wire consists of C, Si, Mn, S, P and the balance Fe, the coating consists of a powder material and a binding agent, and the power material consists of marble, fluorite, strontium carbonate, titanium dioxide, quartz, yttrium-based silicon iron, ferrotitanium, electrolytic manganese, mid-carbon ferromanganese, nickel powder, sodium carbonate and potassium alginate. The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel has excellent allposition welding technology performance, and is stable in electric arc, small in splashing amount and moderate in sleeving especially in vertical welding and overhead welding, melts the coating evenly, enables a weld pass to be beautiful in shaping, achieves good operability for welding operators, and has ideal mechanical performance. The all position welding low hydrogen type electrode excellentin low temperature impact toughness and for the SA-508Gr.4N steel is suitable for the all position welding of the SA-508Gr.4N steel.