In order to study the residual seismic behavior of reinforced concrete（RC）columns，a quasi-static test study was carried out on a full-scale RC column that has undergone a complete pseudo-dynamic test and reached the level of seismic damage of class Ⅱ without strengthening measures. The experimental phenomena, hysteresis curve, bearing capacity, stiffness degradation, ductility coefficient, and energy disspation capacity before and after the quasi-static test are compared and analyzed. The test results show that, the column that has reached the level of seismic damage of class Ⅱ, still retains some seismic capacity without strengthening, and the horizontal force that it can withstand is reduced by around 75%. Finally, the finite element analysis software OpenSees was used to stimulate the column’s hysteresis curve of quasi-static test after the earthquake attack, and a method for simulating the residual performance of RC columns with earthquake damage is proposed, and its reliability is verified.