The invention discloses a method for realizing grading utilization of coal by extracting the coal through mixing of supercritical carbon dioxide and an organic solvent. A method for extracting the solvent to separate a low molecular compound from a main body structure in the coal is an important method for clean and high-efficiency utilization of the coal. In the current general method of extracting by using a mixed solvent of CS2 and organic solvents (such as NMP (N-methyl-2-pyrrolidone) or DMF (Dimethyfumarate) and the like), toxic CS2 which is difficult in sequent separation is adopted, thus the wide application of the method is greatly limited. According to the method disclosed by the invention, non-toxic and harmless recyclable supercritical carbon dioxide is adopted to replace the CS2 and is simply separated from the organic solvent; the process is environment-friendly; the utilization efficiency of the coal can be effectively improved; and the grading utilization of the coal can be better realized.