NOVELTY - The method comprises, utilizing an amines scrubbing unit (A1), producing a desulfurized natural gas without carbon dioxide (CO2) (11) at first and a concentrated gas effluent (3) comprising CO2 and H2S, introducing effluent into a hydrogen sulfide (H2S) collection unit using a solid adsorbent in a form of a metal sulfide (MeS) for performing adsorption of sulfur by reacting the MeS and H2S to obtain metal disulfide (MeS2) and hydrogen, and entering to a methanation unit (M1) that allows collection of CO2 and formation of an additional hot methane flow (7).    USE - The method is useful for producing a desulfurized natural gas (claimed).    ADVANTAGE - The method is capable of producing the desulfurized natural gas without CO2 and with an increased methane content and high purity in a cost-effective and energy-efficient manner.    DETAILED DESCRIPTION - The method comprises, utilizing an amines scrubbing unit (A1), producing a desulfurized natural gas without carbon dioxide (CO2) (11) at first and a concentrated gas effluent (3) comprising CO2 and H2S, introducing effluent into a hydrogen sulfide (H2S) collection unit using a solid adsorbent in a form of a metal sulfide (MeS) for performing adsorption of sulfur by reacting the MeS and H2S to obtain metal disulfide (MeS2) and hydrogen, entering to a methanation unit (M1) that allows collection of CO2 and formation of an additional hot methane flow (7) that is obtained by transferring calories of the methanation unit to a regeneration zone of an H2S adsorption unit using solid absorbent to obtain methane flow for allowing the regeneration of MeS by heating the MeS2 to obtain the MeS and gaseous sulfur, where the methane flow is used for setting a temperature of the gas effluent after heating at a temperature of 250-350 degrees C, introducing hot methane flow the H2S collecting unit, and mixing the methane flow with the desulfurized natural gas output from the amines scrubbing unit to deliver desulfurized natural gas. The regeneration phase of the solid adsorbent implemented in the adsorption unit is operated at a temperature of 200-300 degrees C. A molar relationship of hydrogen/CO2 of the effluent of the adsorption unit is 4-4.2. The regeneration zone of the H2S adsorption unit comprises an exchanger in which the methane hot flow is circulated inside tubes and MeS2 to be regenerated is located inside a grill. A methanation reactor has an annular form, and functions in a radial bed such that a flow runs out from a periphery of the methanation reactor to a central collector.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a method for producing desulfurized natural gas.    Concentrated gas effluent (3)    Additional hot methane flow (7)    Carbon dioxide (11)    Amines scrubbing unit (A1)    Methanation unit. (M1)