Abstract: In order to study the hot forming performance of 2124 aluminum alloy, the hot tensile experiments under different temperature and strain rate conditions were carried out and the material's stress-strain curves were obtained.Aiming at the hot forming characteristics of 2124 aluminum alloy, the constitutive model of the material was established based on the Hansen-Spitel model, and the model parameters were optimized by genetic algorithm.The ABAQUS user material subroutine VUMAT of the Hansen-Spitel constitutive model was developed, and it was applied for the analysis of double C stamping parts.The stamping speed, blank holder force, friction coefficient and temperature were regarded as design variables, and the maximum thinning rate of the forming parts was regarded as the response value to establish the Kriging surrogate model, and the genetic algorithm was used to optimize the process parameters. The hot stamping experiment results of double C parts show that the optimized process parameters can eliminate the sheet metal forming cracking defects, and it verifies the reliability of the constitutive model and the finite element model.