This study was based on the Monocoat（single-coat）system and focused ontesting the recoat adhesion of coatings containing copper phthalocyanine pigment. Throughformulation design，relying on adhesion test results and hardness data of the coatings，the relationship between acid catalysts and copper phthalocyanine pigment，as well as their effects on recoat adhesion，were investigated. The experimental results indicated that waterborneMonocoat coatings containing copper phthalocyanine pigment exhibited good recoat adhesion.Additionally，the addition of acid catalysts significantly improved the recoat adhesion of thecoatings. The study revealed that the main component of copper phthalocyanine exhibitedLewis acid characteristics，catalyzing reactions such as alcohol-ether exchange during thefilm-forming and cross-linking process of the coatings，thereby significantly impacting therecoat adhesion of the Monocoat system. And adjustment of acid catalyst content could notably enhance the performance of the coating，improving practicality and reducing construction risks. Copper phthalocyanine，as a pigment component with catalytic properties，indicated broad application prospects in Monocoat coatings.