Compared with chemical solvent,manual polishing and shot peening,laser paint stripping has a series of advantages such as non-contact,high efficiency and cleaning.In the process of aircraft skin laser paint stripping,aluminum alloy skin matrix may suffer thermal damage due to absorption of partial laser energy.The paper used the fiber laser with laser energy density of 6.12 J/cm2,12.22 J/cm2 and 18.34 J/cm2 to remove the 2024 T-3 aluminum alloy surface paint layer.Using infrared thermal imager (non-contact) combined with paste thermocouple(contact).The temperature of the base material during the laser stripping of the aluminum alloy skin surface was recorded in a timely manner,and the surface microstructure of the substrate after the paint removal and the oxide layer after the paint removal were tested.The results show that the coating can be completely removed by laser technology,and the maximum temperature distribution of the substrate is 49.11 ℃,48.88 ℃ and 68.54 ℃ respectively.The thickness of the oxide layer on the surface decreased slightly,but the microstructure of the surface did not change significantly,indicating that the appropriate laser paint stripping process parameters could be used to remove the coating without causing thermal damage to the aluminum alloy substrate,and the laser paint stripping technology was feasible.