Abstract: A new seismic retrofitting technology of using post-tensioning tendons to retrofit brick wall structures is presented．To verify the validity of the retrofitting technology，MSC.MARC was used to set up the models of one unreinforced brick wall and the other retrofitted with post-tensioned tendons，which were simulated under lateral lowcyclic reversed load，whose results were compared with those of the test． Numerical results showed that this new retrofitting technology could significantly improve the cracking capacity and shear bearing capacity，and the seismic behaviors of the brick wall retrofitted using post-tensioned tendons could be significantly improved．