Among so many technologies of the natural gas desul-phation at home and abroad this peper presents a new desulphationtechnology with phenanthraquinone being studied and run well in itstest production.The technological features ars described with a greatmass of data of experiments and test production.The desulphationmechanism and technological process are clarified.The chemistry sta-bleness of desulphation is tested and analysed in accord with the mainprocess of desulphation chemistry reaction.The paper also presents themethod to raise the stableness of desulphurizer,efficiency of desulphationand rate of recovered sulphate.