The work aims to prepare an aerogel with antirust function from waste newspaper, in order to achieve the diversity of substrates for vapor phase antirust packaging materials and the high-value utilization of waste paper. The waste paper pulp after deinking was dissolved and regenerated with 1-allyl-3-methylimidazole chloride salt (AmimCl), and the aerogel was made after freeze-drying, and then hydrophobic and antirust modifications were carried out on the aerogel by chemical impregnation and vapour phase deposition methods, respectively. The corrosion inhibition rate of the antirust aerogel on Q235 steel was 81.93%, the water contact angle was 104.78°, the compressive strength was 6.91 kPa, and the density was 0.22 g/cm3. The aerogel prepared from waste paper has excellent vapor phase corrosion inhibition performance after hydrophobic and antirust modification, and can be used for rust and corrosion inhibition of metal components.