Abstract: To study residual bearing capacity of concrete-filled steel tubular members in transmission towers,numerical model of CFST members under axial compression after lateral impact is established based on the nonlinear finite element software ABAQUS;The classical lateral impact test of CFST members under axial compression is verified. The analysis shows that the numerical simulation results are in good agreement with the experimental results. Based on this model,the verification analysis of the quasi-static compression model is carried out,and the results show that the quasi-static calculation results are basically the same as the implicit calculation results. Therefore,the compression calculation of the concrete-filled steel tubular member in the transmission tower after the impact is completed under the quasi-static ABAQUS/Explict,and the failure mode and dynamic response under lateral impact are studied. And the residual axial bearing capacity of members is analyzed after damaged. The parameters discussed include impact mass,impact velocity,steel tube wall thickness,slenderness ratio and steel strength,which parameters have the greatest impact on the damage of CFST components after impact. Reasonable design suggestions are given for the use of concrete-filled steel tubular members in the project,especially in the structure of the transmission tower. According to different parameters,empirical equation between each parameter and the residual bearing capacity of the damaged component is fitted through multivariate regressive analysis. The results show that local deformation and overall deformation occur at the bottom of CFST members after impact,and the former mainly occurs near the impact point while the later at the bottom of support;With the increase of steel tube wall thickness or high steel strength,the damage degree of the specimen decreases gradually;The slenderness ratio has little influence on the damage degree of the specimen within a certain range. Within the common scope of engineering,based on the results of parameter analysis,the practical calculation formula of damage degree（D’）is fitting,and the calculation results of the damage degree definition formula are compared. By comparison,it is found that the fitting formula is in good agreement with the calculation formula,and most of the errors in the calculation results of the fitting formula are within 15%, so that the fitted empirical formula can provide some references for the rapid calculation of the residual bearing capacity of CFST members after lateral impact.