The invention discloses an indoor sound absorption and heat insulation floor tile and a preparation method, and belongs to the technical field of building materials. The floor tile is prepared from gypsum, cement, coal ash, lime, attapulgite clay, nano-silicon dioxide, aluminum oxide, kieselguhr, quartz powder and oil shale residues. The preparation method includes the steps that pasty attapulgite clay is prepared, and then gypsum, cement, coal ash, lime, nano-silicon dioxide, aluminum oxide, kieselguhr, quartz powder and oil shale residues are weighed respectively, smashed and subjected to ball milling for 2-5 h to obtain a mixture a1; the mixture a1 and the pasty attapulgite clay are mixed and stirred to be uniform, mold forming is carried out, and after treatment, the floor tile is obtained. The indoor sound absorption and heat insulation floor tile has a good waterproof effect and good sound absorption and heat insulation effects and effectively reduces energy consumption. Besides, the preparation method is simple and easy to implement and has high application value.