The invention discloses activated carbon diatomite particles capable of rapid purification of flue gas, and is characterized in that the activated carbon diatomite particles are prepared from the following raw materials in parts by weight: 105-110 parts of wooden activated carbon, 35-40 parts of diatomite, 1-2 parts of tripotassium citrate, 4-6 parts of expanded perlite, 3-5 parts of ammonium chloride, 2-3 parts of zirconium silicate, 6-9 parts of nano kaolin, 4-6 parts of nano silica, 3-5 parts of copper sulfate, 1-2 parts of rosin-polythylene oxide ester, 3-5 parts of methyldiethanolamine, 4-6 parts of an adsorption auxiliary agent, and a proper amount of water. The formula is reasonable; with addition of nano kaolin and expanded perlite, much surface pores exist, and the porosity is high; with addition of methyldiethanolamine, the activated carbon diatomite particles have a flue gas rapid purifying effect; with addition of the adsorption auxiliary agent, the activated carbon diatomite particles have special porousness, and prolong the contact time with gas; and activated carbon can quickly adsorb various solutes and free gases, and is high in activity, high in desulfurization precision, and suitable for industrial dry desulfurization, automobile tail gas desulfurization, daily air purification and the like.