The invention discloses tile bonding glue prepared from red mud. The tile bonding glue is mainly prepared from the following raw materials in parts by weight: 10-15 parts of dry powder water glass, 30-40 parts of red mud, 30-40 parts of superfine slag powder, 5-10 parts of metakaolin, 2-5 parts of fly ash, 2-5 parts of gypsum powder, 1-3 parts of silica fume, 1-3 parts of latex powder, 0.2-0.7 part of a water-retaining agent, 1-2 parts of a retarder and 120-180 parts of aggregates. By taking red mud as the main raw material, the prepared binder product has good performance; through test, the initial tensile strength of a binder is 0.7MPa, the tensile strength of the binder after waterproofing treatment reaches 0.5MPa, and the binder has good freeze-thawing resistance; prepared bonding mortar is easy to construct, good in flow fall resistance and low in cost, and the consumption of the red mud is high. Besides, by taking industrial waste residues as the main raw materials, sources are very wide, and the production process is environmentally friendly.