Elemental sulfur corrosion has become one of the most important risks during production in highly sour gas fields and one of the most complex corrosion issues due to the co-existing sulfur H2S and CO2. According to the condition of downhole and surface system in sour gas field the interactive effects of H2S and elemental sulfur on the corrosion behavior were investigated through corrosion simulation test in autoclave slow strain rate test and electrochemical measurements. The corrosion products were also studied by SEM and XRD methods. The results show that the existence of H2S significantly influences the elemental sulfur corrosion rate and type of steel.