Silica-based aerogels were materials with outstanding properties，but their poor mechanical performance and cumbersome drying methods severely limited their practical applications.Here，using terephthalaldehyde and 3-aminopropyltrimethoxysilane as precursors，combined with methyltrimethoxysilane and dimethyldimethoxysilane as co-precursors，a novel bridged silica aerogel via a sol-gel process and atomspheric pressure drying method was produced.The effect of the molar ratio n（H₂O/Si） on aerogel performance was investigated and the density，shrinkage，hydrophobicity，mechanical properties，and thermal characteristics of the prepared crosslinked aerogels were detailed.The results show that at n（H₂O/Si）=4，the aerogel exhibits low density（82 mg/cm³） and thermal conductivity ［29 mW/（m·K）］，high hydrophobicity（contact angle150°），and excellent flexibility（E=40 kPa）；under 50% compressive strain，the stress decreases by only 10% after 100 loading-unloading cycles.Thermogravimetric analysis indicates superior thermal stability，with mass loss 5% at 380 ℃ under nitrogen.