Abstract: Secondary refining technology for low-sulfur and high strength weathering steel was introduced,especially LF.The service condition and effect of the new material(the vanadium-titanium-micralloyed coreline)were detailed.As a result,the production became economic and efficient.Practice shows that through choosing reasonable desulfurization process and using new technologies of microalloying,the product composition(S、V、Ti、N、Ca etc.)of low-sulfur and high strength weathering steel is stable by LF refining,the mechanical properties and corrosion resistance is excellent also.