Insulating autoclaved brick

The invention discloses an insulating autoclaved brick which is prepared from the following raw materials in parts by weight: 5-8 parts of cement, 13-15 parts of carbide slag, 4-6 parts of titanium dioxide, 5-8 parts of ignimbrite, 0.1-0.2 part of aluminum powder, 2-4 parts of tea seed cake powder, 0.2-0.4 part of sodium carbonate, 3-5 parts of gypsum, 0.2-0.4 part of barren mountain earth, 3-5 parts of coal gangue, 0.2-0.4 part of steel slag powder, 1-2 parts of sugar calcium, 0.3-0.5 part of honey, 0.3-0.5 part of starch, 0.1-0.2 part of stearic acid, 0.3-0.5 part of benzoyl peroxide, 0.1-0.2 part of tert-butyl hydroperoxide, and an appropriate amount of water.