The invention discloses a novel sulphur-fixing agent. The novel sulphur-fixing agent is prepared from, by weight, 2-5 parts of kaolin, 3-6 parts of bentonite, 4-8 parts of zeolite, 5-8 parts of kieselguhr, 2-4 parts of perlite, 10-15 parts of cordierite, 1-3 parts of talcum powder, 6-8 parts of calcium oxide, 4-8 parts of ferric oxide, 3-5 parts of zinc oxide, 0.2-0.4 part of calcium peroxide, 6-8 parts of strontium carbonate, 4-7 parts of barium hydroxide, 0.2-0.5 part of potassium sulphate, 0.3-0.7 part of vanadium pentoxide, 6-9 parts of niobium pentoxide, 0.1-0.3 part of aluminum powder, 20-25 parts of ethyl alcohol, 5-9 parts of nanometer titania and 6-8 parts of nano calcium carbonate. The novel sulphur-fixing agent is reasonable in formula, resistant to high temperature and good in high-temperature sulphur-fixing effect, and has good development prospects on the aspect of coal sulphur fixing.