Trichloroisocyanuric acid causes substitution, cross-linking and cyclization of the rubber surface by chlorination. These reactions do not lead to a decrease in the flexural crack resistance of the rubber, but can increase the polarity of the rubber surface and significantly improve the adhesion. . The outstanding advantage is that the rubber surface does not have to be mechanically ground and is suitable for bonding with PU resin. Trichloroisocyanuric acid reacts with water under acidic conditions to form hypochlorous acid, which rapidly dissociates and reacts with the unsaturated double bond of the rubber. At room temperature, the surface of each material adsorbs moisture, and the surface of the material forms weak acid conditions under the action of carbon dioxide in the air. Therefore, the above reaction occurs when trichloroisocyanuric acid is in contact with the surface of the weakly acidic rubber. Trichloroisocyanuric acid can be applied to various rubber surfaces after being dissolved in an organic solvent, and then bonded with a PU adhesive to obtain excellent adhesion properties.