NOVELTY - A sulfur tolerant catalyzing process for preparing low carbon alcohol from synthesis gas and co-producing natural gas, comprises: (a) sending synthesis gas to the desulfurization device to rough desulfurize; (b) mixing the desulfurized synthesis gas with the tail gas; (c) condensing the low carbon alcohol synthetic product to obtain liquid phase of alcohol-water-oil and tail gas mixture; (d) mixing the tail gas in low carbon alcohol synthesis reaction with the tail gas recycled in the methanation; and (e) condensing the methanation product to obtain liquid phase of oil, alcohol water and gas.    USE - The sulfur tolerant catalyzing process is useful for preparing low carbon alcohol from synthesis gas and co-producing natural gas (claimed).    ADVANTAGE - The sulfur tolerant catalyzing process has simple process and low cost, organically couples the low carbon alcohol synthesis gas with methanation process, improves carbon utilization rate, and achieves co-production and complementation of low carbon alcohol and natural gas.    DETAILED DESCRIPTION - A sulfur tolerant catalyzing process for preparing low carbon alcohol from synthesis gas and co-producing natural gas, comprises: (a) sending synthesis gas to the desulfurization device to rough desulfurize, obtaining sulfur (S) product and desulfurized synthesis gas; (b) mixing the desulfurized synthesis gas with the tail gas recycled in low carbon alcohol synthesis reaction in (c), sending to the low carbon alcohol synthesis device, contacting with sulfur tolerant low carbon alcohol synthetic catalyst, synthesizing under synthesis conditions; (c) condensing the low carbon alcohol synthetic product to obtain liquid phase of alcohol-water-oil and tail gas mixture comprising carbon monoxide (CO), hydrogen gas (H2), carbon dioxide (CO2), and hydrocarbon with 1-5 carbon atoms; recycling one part of tail gas mixture in the low carbon alcohol synthesis reaction, and sending the another part to methanation, condensing the liquid phase of alcohol-water-oil and product of methanation obtained in (e) to obtain oil and liquid phase of alcohol and water, mixing and separating oil and water to obtain oil product and alcohol water, separating alcohol and water from the alcohol-water mixture to obtain low carbon alcohol and water; (d) mixing the tail gas in low carbon alcohol synthesis reaction with the tail gas recycled in the methanation in (e), sending to methanation device, and subjecting to methanation under conditions of sulfur tolerant methanation catalyst and methane conversion condition; and (e) condensing the methanation product to obtain liquid phase of oil, alcohol water and gas containing methane (CH4), CO2, CO, H2, hydrocarbon with 2-5 carbon atoms, condensing the liquid phase with low carbon alcohol synthesis reaction product in (c) to obtain liquid phase mixture of alcohol-water-oil; recycling one part of gas mixture of CH4, CO2, CO, H2, hydrocarbon with 2-5 carbon atoms in methanation, sending the other part of gas mixture to CO2 separation device, and separating CO2 to obtain synthetic natural gas (SNG).    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of the sulfur tolerant catalyzing process for preparing low carbon alcohol from synthesis gas and co-producing natural gas (Drawing includes non-English language text).