Based on the complete analysis of mechanical properties of GFRP （glass-fiber reinforced plastic)tube-circular steel tube concrete column under axial compression and bias, in order to study the influence of the four influencing parameters of the thickness of the internal GFRP tube, the thickness of the external steel tube and the aspect ratio of the member on the ductility of the composite short column of GFRP tube-circular steel tube concrete under axial compression and bias, the finite element software ABAQUS is used to simulate the influence of the combined short column under axial compression and bias pressure under the condition of influencing parameter changes. The numerical simulation results show that the simulation results of ABAQUS are in good agreement with the experimental results. In the axial pressure state, when the diameter of the internal GFRP tube remains the same, the ductility of the composite column decreases with the increase of the thickness of the internal GFRP tube, the ductility of composite column is improved with increasing thickness of external steel tube, the ductility of composite column deteriorates with the increase of aspect ratio GFRP tube fiber winding Angle of 75°~90° has the best effect on improving the displacement ductility coefficient of components. In the state of bias mechanics, the thickness of GFRP tube has the greatest influence on the ductility of composite column, the ductility of the small eccentricity column is not affected by the thickness of the outer steel tube,the ductility of the large eccentricity column is improved with the thickness of the outer steel tube increasing, the ductility of the composite column decreases nonlinearly with the increase of the aspect ratio of the member. The decreasing speed is faster in the early stage and slower in the later stage.