Leakage-proof disposable cup sealing structure

The utility model relates to the technical field of disposable cups, in particular to a leakage-proof disposable cup sealing structure which comprises a cup body and a cup cover, a cup opening is formed in the upper end of the cup body, a supporting ring is fixedly connected to the outer wall of the cup opening, a limiting ring is fixedly connected to the upper surface of the supporting ring, and a limiting groove corresponding to the limiting ring is formed in the lower bottom face of the cup cover. A first clamping groove and a second clamping groove are formed in the inner side and the outer side of the limiting ring respectively, a first protruding block and a second protruding block are fixedly connected to the two sides of the limiting groove respectively, and the first protruding block corresponds to the first clamping groove. Due to the fact that the depth of the first clamping groove is larger than that of the second clamping groove, when the first protruding block slides into the first clamping groo