The invention discloses an environmentally-friendly ceramic tile sealant, which is prepared from the following raw materials in parts by weight: 12-15 parts of compressive membrane, 20-35 parts of filler, 25-35 parts of cement, 30-50 parts of binder, 50-60 parts of backing material and 35-50 parts of water. The environmentally-friendly ceramic tile sealant has the advantages of water resistance, moisture resistance, permeability resistance, pressure resistance, abrasion resistance, no dirt and environment protection. After solidification, the sealant is level with the ceramic surface and is free from tiny gaps, the environmentally-friendly ceramic tile sealant has the advantages of longer expiration date time, convenience in use, lower cost, no pollution and attractive appearance and richand various colors, is harmless for the human body and is worth energetically popularizing and using, and different tones can be modulated according to own requirements.