The invention discloses an underground eccentric gas separating tubular column. The underground eccentric gas separating tubular column comprises an outer tube, an eccentric connector and a connecting base, wherein the eccentric connector and the connecting base are connected with the upper end and the lower end of the outer tube respectively. One end of an inner tube is communicated with the eccentric connector, and the other end of the inner tube is communicated with the interior of the outer tube. The axis of the inner tube is parallel to the axis of the outer tube, an eccentric annulus is formed between the inner tube and the outer tube, a plurality of gas outlet holes and a plurality of liquid inlet holes are formed in the two sides of the outer tube, the gas outlet holes are located in the wide side of the eccentric annulus, and the liquid inlet holes are located in the narrow side of the eccentric annulus. The axis of the inner tube and the axis of the outer tube are not located on the same straight line. When gas-liquid mixtures separated twice flow into the outer tube through the liquid inlet holes, the gas-liquid mixtures will be separated again on two eccentric flow passages between a sleeve and the outer tube; in other words, simple gas-liquid separation is repeated while the gas-liquid mixtures naturally slide down under the factor of the gravity of the gas-liquid mixtures, the content of gas in liquid finally entering the inner tube is further reduced, and the pump efficiency of an oil pump is improved.