Basic dyes are highly toxic and have adverse effects on humans such as accelerated heart rate, shock, cyanosis, and tissue necrosis upon ingestion or skin contact. Efficient removal of basic dye pollutants from wastewater is therefore essential for the protection of the environment and human health. Biomolecules exhibit excellent dye removal performance in terms of removal capacity, selectivity, and rate. However, their poor thermal/chemical stability precludes their large-scale industrial applications. Herein, porous aromatic frameworks (PAFs) were utilized for the biomimetic construction of mussel, which included two unique features: (1) multistage pore structures for the rapid transport of dye contaminants and (2) mussel-inspired adhesive surfaces for cationic dye removal. Accordingly, the solid PAFs exhibited a record adsorption capacity of 7300 mg g