▎ 摘　　要

NOVELTY - Preparing C-band composite electromagnetic wave absorbing material involves adding graphene oxide dispersion in deionized water, dissolving, adding copper doped tin oxide to complete dissolution, adding silane coupling agent, performing hydrothermal treatment, freezing, drying after completion of hydrothermal treatment, and calcining in an argon atmosphere. USE - Method for preparing C-band composite electromagnetic wave absorbing material. ADVANTAGE - The method has good repeatability, cost-effective, eco-friendly, cleanliness and non-toxicity, and easy mass production, and greatly improves polarization loss of the composite material, and better microwave absorption performance in C wave band, when the filling amount of the absorbent is 5 wt.%.