Abstract: In order to efficiently remove organic dyes from waste water, ZIF-67/waste cotton cellulose composite aerogels (ZIF-67/WCCA) were prepared by freeze drying technology using waste cotton fabrics as cellulose raw materials, alkali/urea as dissolution system, N, N’-Methylenediacrylamide (MBA) as cross-linking agent, and cobalt-based zeolite imidazolate metal-organic framework (ZIF-67) nanoparticles were grown in situ on the surface of WCCA. ZIF-67/WCCA were prepared and used to adsorb malachite green (MG) and degrade methylene blue (MB) with peroxymonosulfate (PMS) activation. The structure and composition of the ZIF-67/WCCA were characterized by scanning electron microscopy and X-ray diffraction. The conditions affecting the adsorption and degradation properties of the dyes were also discussed. The results show that ZIF-67 nanoparticles of dodecahedron are loaded on the network framework of cellulose aerogels from waste cotton. The adsorption capacity of MG can reach 1474.01 mg·g⁻¹ at room temperature, and the degradation rate of MB at 100 s can reach 100% by using ZIF-67/WCCA. ZIF-67/WCCA can be applied in fields of dye adsorption and catalytic degradation in sewage.