A saltpetering-free high-strength tile adhesive is composed of the following raw materials in percentage by weight: 23 to 30% of high aluminium cement, 42 to 50% of fly ash, 12 to 16% of blast furnace slag, 6 to 10% of heavy calcium carbonate powder, 3 to 6% of redispersable emulsion powder, 0.5 to 1% of antifoaming agent, 0.1 to 0.5% of cellulose ether, and 0.2 to 0.5% of saltpetering inhibitor. By using the provided adhesive, saltpetering will not appear on the tile surfaces or the gaps between the tiles. The provided adhesive also has the advantages of strong adhesive force, draping resistance, slippage resistance, good waterproof performance, and excellent thermal aging (70 DEG C) resistant property, and can tolerate the changes of dryness and dampness or freezing and thawing. The problems of saltpetering, hollowing, and peeling off of tiles are solved.