A study was made to investigate the effect of tungsten (W) addition on the microstructure, tensile properties, Vickers hardness and corrosion resistance of S355NL forging steel. Mechanical properties were evaluated and considered in the context of interlamellar spacing of pearlite. Microstructure revealed that the addition of W favors the formation of intragranular acicular ferrite, and leads to a decrease in the interlamellar spacing of pearlite. After W addition, the corrosion rust film became intact. The steel containing W showed fewer microcracks distribute in the corroded surface compared with that without W. It was concluded that the addition of W is beneficial for improving both the mechanical properties and corrosion resistance of S355NL forging steel.