Abstract: Characterization ways of sulfide concentration in liquefied petroleum gas(LPG)are detailedly discussed from three aspects including sulfide types, analysis methods and analysis results. The article discusses the significance of the conversion of sulfide concentration in LPG. The conversion method is focused on two aspects:namely measurement datum and units conversion. Finally, the formulae for sulfides concentration conversion are established and the summary table of the calculation formula is formed and the conversion coefficient table for quick search is provided for common sulfur compounds in liquefied petroleum gas in the article.