Abstract: In order to improve the mechanical properties and stability of chitosan aerogel (CA) and make it have better application prospects. In this study, a thermal treated drilling cuttings (TTDC)/chitosan composite aerogel (TTDC/CA) was prepared based on the sol gel method, and the structure, composition, stability and mechanical properties of the material were characterized and tested. The results show that the composite aerogel is porous and exhibits anisotropic, and the TTDC affects the pore structure of the material. TTDC increased the specific surface area of the composite aerogel. With 3wt% TTDC added, the specific surface area of composite aerogel reached 12.883 m ²/g, nearly twice that of CA. TTDC can also improve the mechanical compressibility and acid resistance of composite aerogels. At pH = 2, the addition of 3wt% TTDC reduced the mass loss of CA by 46%. The preparation of this composite aerogel is simple and rapid, which has good potential for application in areas such as environmental remediation.