The study aimed to discuss the effects of SiO2 aerogels hydrophobic and thermal insulation coating on mechanical properties, hydrophobic properties and thermal insulation properties of corrugated cardboard. First of all, the hydrophobicand thermal insulation coating was prepared by mechanical blending and surface modification, which was coated on the surface of corrugated board by bar coater. Its effects of hydrophobicity were evaluated by contact angle, and the side compression strength, flat crush strength, puncture strength and indentation strength of the modified cardboard were also evaluated. The heat insulation package of 90 mm×90 mm×100 mm was prepared, its effect of heat insulation properties were evaluated by ice melting test. The contact angle of corrugated board after treatment with SiO2 aerogels hydrophobic coating was 91.75° and increased by 6.25°. With increasing mass fraction of SiO2 aerogels, the side compression strength, flat crush strength, puncture strength and indentation strength of corrugated cardboard all showed a rising trend, increased by 5.6%, 0.6%, 2.4% and 2.7%, respectively. When SiO2 aerogel is 2% (mass fraction), the corrugated board after treatment with SiO2 aerogels hydrophobic coating has excellent thermal insulation performance. Compared to that of uncoated corrugated cardboard, the temperature can be reduced by up to 13.6 ℃ when wet film thickness of SiO2 aerogel heat insulation coating is 60 μm. This method expands the application scope of SiO2 aerogels in packaging industry, and provides reference for future thermal insulation packaging materials.