Abstract: To investigate the influence of imidazolium-based ionic liquids（ＩＬｓ） on the heat transfer characteristics of coal, the gas-fat coal from Ewirgol Coal Mine was selected, and ＢＭＩＭＢＦ₄, ＢＭＩＭＮＯ₃, ＢＭＩＭＩ, ＢＭＩＭＰＦ₆ and ＢＭＩＭＮＴｆ₂ were adopted to treat coal. The laser heat conduction experiment was conducted to measure the thermal diffusivity, specific heat capacity, and thermal conductivity for ILs treated coal and untreated coal at 30–300 ℃ under air atmosphere, and the influence of ILs on thermophysical parameters of coal was obtained. Results indicated that: with elevated temperature, the thermal diffusivity of ILs treated coal and untreated coal decreased and then increased, the specific heat capacity rose and then tended to be steady, and the thermal conductivity enhanced slowly and then increased rapidly. In fixed temperature, the thermal diffusivity and thermal conductivity of ILs treated coal were lower than that of untreated coal, but specific heat capacity was higher than that of untreated coal. Meanwhile, the thermal diffusivity and thermal conductivity of ＢＭＩＭＢＦ4 treated coal decreased by 12.9% and 7.3%, respectively, and specific heat capacity increased by 9.0%, which was higher than the effect of other ILs on thermophysical parameters of coal. ＢＭＩＭＢＦ4 ｈａd obvious inhibition effect on heat transfer characteristics of coal.