Abstract: Concrete-filled double steel tubular (CFDST) columns are widely used in building structures due to their excellent fire and impact resistance. However, due to the difficulty and high cost of experiments, there is still insufficient research on the dynamic response of CFDST columns under the combined effect of fire and impact. In this paper, based on a finite element platform, lateral impact finite element models of CFDST columns at temperatures of 20℃, 200℃, 400℃, 600℃, and 800℃ were established using the fully thermodynamic coupling method, considering the effects of temperature softening and strain rate on the intrinsic properties of the materials. After validating the finite element model for fire and impact resistance tests of CFDST columns, the dynamic response of these columns at different temperatures was analyzed in terms of failure mode, stress distribution, deformation characteristics, contact stress, and energy changes. The model was then used to further explore the effects of parameters such as axial compression ratio, hollow ratio, concrete strength, and nominal steel content on the impact force plateau values and maximum deflection at mid-span of CFDST columns. Finally, simplified calculation formulas for the dynamic bending capacity and maximum deflection at mid-span of CFDST columns under high temperature and impact coupling were proposed. The results show that bending failure of CFDST columns mainly occurs when subjected to lateral impact at high temperature, with obvious plastic hinges forming at the middle of the member span and both ends. The outer steel tube serves as the primary energy-dissipating component of the CFDST column. The growth of mid-span deflection of CFDST columns increases significantly when the temperature exceeds 400℃, while the impact force plateau value decreases sharply. The axial force has a weakening effect on the CFDST columns, and the degree of weakening is more significant when the axial compression ratio is greater than 0.2.The increase of the hollow ratio from 0.3 to 0.7 and the increase of the concrete strength from 30 MPa to 60 MPa can significantly improve the impact resistance of CFDST columns at 800℃, while the increase of the nominal steel content from 0.043 to 0.103 has a little effect on it; The dynamic bending capacities and maximum deflections at mid span calculated by the formula are agree well with the simulated values．