Due to the high ambient temperature and humidity associated with a specific type of fairing， the product performance may be adversely affected if the fairing is stored for an extended period. In order to verify the influence of hot and humid environment on the properties of aluminum honeycomb sandwich structure composites， the samples were subjected to conditions of 80 ℃ and 85% relative humidity， and the relationship between storage time and moisture absorption was investigated，along with the effects of the hot and humid environment on the properties of flatwise tension strength， double compression shear and edgewise compressive strength. The test results show that the water absorption reaches equilibrium when the storage time reaches 8 days， the double compression shear strength remains relativel unchanged， and the flatwise tension strength decreases by 11.08%.Additionally，the edgewise compressive strength and edgewise compressive modulus decreas by 11.04% and 13.94% respectively. An analysis of the damage morphology reveals that after the water absorption reached equilibrium， the Al/Mg ratio on the surface of aluminum honeycomb increases from 42.11% to 48.79%， and the honeycomb appearance did not change significantly. At this time， the failure morphology of the flatwise tensile specimen transitions from aluminum honeycomb failure to aluminum honeycomb and aluminum honeycomb/panel interface mixed failure mode.