NOVELTY - Production of methanol includes determining coal quality index; determining carbon material loss rate, gas production rate, and raw coal gas composition; drying, grinding, granulating; carbonizing, adding carbon carbonate, carbonizing, adding carbon carbonate; heating, carbonizing, heating, carbonizing, heating, quenching, sieving; heating, removing tar, desulfurizing, washing with ammonia and benzene; preprocessing, carrying out first organic sulfur conversion, desulfurizing, carrying out second organic sulfur conversion, desulfurizing, purifying; and carrying out alkane conversion.    USE - Method for producing methanol (claimed) used for high temperature dry distillation coal comprehensive utilization project.    ADVANTAGE - The method is simple and has simple device investment, and low cost carbon.    DETAILED DESCRIPTION - Production of methanol comprises determining coal quality index of greater than or equal to 50% FCd, greater than or equal to 25% Vadf, less than or equal to 25% Ad, and less than 1.5% St,d.; determining carbonate carbon material loss rate, coal gas production rate, and raw coal gas composition; drying, grinding, and granulating into less than 80 mesh; adding in mixed coal into furnace, carbonizing, adding 3-20 wt.% carbon carbonate, carbonizing, and adding 5-25 wt.% carbon carbonate; air heating through thermal decomposition and excess hydrogen gas with carbon, carbonizing, continuously heating for 6-12 hours, gradually raising temperature to 700-900 degrees C, carbonizing at high temperature, continuously heating for 12-24 hours, gradually raising temperature to 900-1100 degrees C, quenching, and sieving to obtain solid clean fuel; heating with overflowing crude dry coal, removing tar, desulfurizing with wet flue gas, washing with ammonia and benzene, and recovering benzene to obtain carbon complementary purified dry coal having tar content of less than 0.02 g/m3, hydrogen sulfide content of 0.2 g/m3, ammonia content of 0.05 g/m3 and benzene content of 4 g/m3; preprocessing, carrying out first organic sulfur conversion, desulfurizing crude, carrying out second organic sulfur conversion, desulfurizing, and deeply purifying until total sulfur of less than or equal to 0.1 ppm; carrying out alkane conversion of methane (CH4), CmHn to hydrogen gas and carbon monoxide (H2+CO) as synthesis gas and synthesizing 0.4% CH4 with hydrogen to carbon ratio of alkane R=(H2-CO2)/(CO+CO2)=2-2.2 to obtain methanol synthesis gas; carrying out methanol synthesis of H2, CO, carbon dioxide (CO2), and crude methanol in the presence of copper-zinc-chromium-based catalyst at 200-300 degrees C and pressure of 4-8 MPa, and distilling.