A method for removing SO x from a gas, which comprises: mixing ethylene glycol and/or polyethylene glycol with an organic acid containing no nitrogen atom in a molecule and/or an organic acid salt containing no nitrogen atom in a molecule to form an ethylene glycol composite solution, bringing the ethylene glycol composite solution into contact with the gas containing SO x to absorb the SO x in the gas, wherein x = 2 and/or 3; wherein, in the ethylene glycol composite solution consisting of ethylene glycol and/or polyethylene glycol along with the organic acid and/or organic acid salt containing no nitrogen atom in a molecule, ethylene glycol and/or polyethylene glycol will form associated substance with the organic acid and/or organic acid salt containing no nitrogen atom in a molecule via hydrogen bond, and will also form esters; wherein, the ethylene glycol composite solution contains a certain amount of additives, the additives being one or more of organic amines, amides, sulfones, sulfoxides and metallorganic compounds, and the mass content of the additives in the ethylene glycol composite solution is less than 10%; the organic amines include alkylamines and aromatic amines; the alkylamines such as monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine,triethylamine, monopropylamine, dipropylamine, tripropylamine, n-propylamine, iso-propylamine, monobutylamine, dibutylamine, tributylamine, n-butylamine, sec-butylamine, iso-butylamine, tert-butylamine, ethylenediamine, propanediamine, hexamethylenediamine, triethylenediamine, diethylenetriamine, triethylenetetraamine, tetraethylenepentaamine, polyethylenepolyamine; the aromatic amines such as aniline, N-methylaniline, N-ethylaniline, N-propylaniline, N-butylaniline, N,N-dimethylaniline, N,N-diethylaniline, N,N-dipropylaniline, N,N-dibutylaniline, phenylenediamine, alpha-naphthylamine, halogenated aniline, nitroaniline, sulfonic aniline; the amides include formylamide, acetamide, DMF, MDEA, formanilide, acetanilide, propionanilide, butyrylanilide, benzyldimethylamine, benzyldiethylamine, benzyldimethylpropylamine, benzyldibutylamine; the sulfones include dimethyl sulfone, diethyl sulfone, dipropyl sulfone, dibutyl sulfone, bis-hydroxyethyl sulfone; the sulfoxides include dimethyl sulfoxide (DMSO), diethyl sulfoxide, dipropyl sulfoxide, dibutyl sulfoxide; the metallorganic compounds include transition metallorganic compounds; wherein, the ethylene glycol composite solution with absorbed SO x is regenerated by one or more of a heating method, a vacuum method, a gas stripping method, an ultrasonication method, a microwave method, and a radiation method; regeneration temperature is 0 to 300 °C; sulfur dioxide and/or sulfur trioxide are released in the regeneration; and the regenerated ethylene glycol composite solution is recycled for use; the total mass content of ethylene glycol and/or polyethylene glycol along with the organic acid containing no nitrogen atom in a molecule and/or the organic acid salt containing no nitrogen atom in a molecule is more than or equal to 50%, and the mass content of water is less than 50%; in the ethylene glycol composite solution, the organic acid and/or organic acid salt containing no nitrogen atom in a molecule refers to an organic monoacid, an organic monoacid salt, an organic polyacid and an organic polyacid salt containing no nitrogen atom in a molecule, wherein the organic monoacid containing no nitrogen atom in a molecule is an organic compound containing no amine group and containing only one carboxylic acid group in a molecule, such as formic acid, acetic acid, butyric acid; the organic monoacid salt containing no nitrogen atom in a molecule contains no amine group and contains only one carboxylic acid group in a molecule, with the carboxylic acid group bonding to ions, such as sodium ions and/or potassium ions and/or magnesium ions and/or calcium ions and/or transition metal ions, thus forming carboxylic acid salts, such as formic acid salts, acetic acid salts, butyric acid salts; the organic polyacid containing no nitrogen atom in a molecule refer to an organic acid containing no amine group and containing two or more than two carboxylic acid groups in a same molecule, such as ethanedioic acid, propanedioic acid, butanedioic acid, tannin acid, polygallic acid and citric acid; the organic polyacid salt containing no nitrogen atom in a molecule contains no amine group and contains two or more than two carboxylic acid groups in a same molecule, with at least one carboxylic acid group bonding to metal ions, such as sodium ions and/or potassium ions and/or magnesium ions and/or calcium ions and/or transition metal ions, thus forming carboxylic acid salts, such as ethanedioic acid sodium salt, propanedioic acid potassium salt, butanedioic acid potassium salt, tannin acid potassium salt, polygallic acid potassium salt, citric acid potassium salt; the mass content of the organic acid containing no nitrogen atom in a molecule and/or organic acid salt containing no nitrogen atom in a molecule in the ethylene glycol composite solution is less than 30%; the absorption is performed under a normal or increased pressure and the absorption temperature is between_-20 to 80°C.