Coal is a great source of energy gifted by the nature. Main hazard in the use of coal is the production of sulphur oxides, sulphur dioxides, and nitrogen oxides which affect the climate severely. To protect environment from these hazardous oxides of sulphur, clean coal technology is being introduced and applied all over the world. Various desulphurization methods such as chemical, physical or biological have been used. In this study oxidative desulfurization using highly efficient deep eutectic solvent (DES) was carried out by ultra-sonication method. Choline chloride and ethylene glycol in 1: 2 ratios were used to prepare DES. Oxidative desulfurization process was utilized to treat coal samples using KOH as an oxidant. Oxidative desulphurization (of organic/inorganic sulphur forms) of coal was achieved by using deep eutectic solvent. ASTM methods were used to estimate different forms of sulphur in coal. The Fourier Transform Infrared spectroscopy (FTIR) was used to estimate the amount of sulphur removed from three different coal samples.