The invention discloses a cup with a scald-preventing protrusion. The cup comprises a cup body and is characterized in that the scald-preventing protrusion is arranged on the inner side wall of the cup body and located close to a cup mouth; the cup body is of a double-layer structure and comprises an inner cup body and an outer cup body, and a heat insulation cavity is formed between the inner cup body and the outer cup body; the hollow scald-preventing protrusion is inwards recessed in the side wall of the inner cup body and located close to the cup mouth. The scald-preventing protrusion plays an unexpected effect, when a user inclines the cup to prepare for drinking, hot water on the surface in the cup flows around the two sides of the end, far away from the cup mouth, of the scald-preventing protrusion, the hot water flowing around the two sides of the scald-preventing protrusion finally gathers at one end, close to the cup mouth, of the scald-preventing protrusion and then is drunk, the temperature of the hot water which flows around the two sides of the protrusion is lowered to some extent, and the mouth is prevented from being scalded when the user drinks the hot water. The cup with the scald-preventing protrusion is simple, practical and convenient to popularize.