38CrMoAl steels were subjected to quasi-static and impact tensile tests with strain rates from 0.001 to 3000 s-1 after salt spray corrosion at different periods to investigate the effect of salt spray corrosion environment on the dynamic mechanical properties of 38CrMoAl steel materials under high strain rate conditions . The surface morphology, corrosion pit depth, corrosion product composition and fracture morphology of 38CrMoAl steel after salt spray corrosion were analyzed by means of digital microscope, FT-IR, SEM and EDS. The results show that the corrosion rate is positively correlated with the salt spray corrosion time, the corrosion acceleration process follows the power function characteristic, and the corrosion product layer promotes the corrosion of 38CrMoAl steel. The yield strength of 38CrMoAl steel increases with the increase of strain rate and decreases with the increase of corrosion cycle. The fracture of 38CrMoAl steel after salt spray corrosion shows many tear-like features. The longer the corrosion time, the more tear-like marks. The tear-shaped fracture makes the fracture necking of the specimen no longer develop uniformly, resulting in a decrease in the tensile strength and yield ratio after yielding. The strain rate strengthening term and adiabatic softening term in the J-C constitutive model were corrected, and corrosion correction parameters were added, so that the new model can accurately characterize the dynamic mechanical behavior of 38CrMoAl steel in a salt spray corrosion environment.