The ultra-high voltage (UHV) direct current (DC) wall bushing is a horizontally-installed cantilever component for connecting the valve hall and the DC field in UHV converter stations and its seismic performance is essential to the safe operation of the converter station. The dynamic characteristics and seismic response of the structure of the wall bushing before and after seismic under the consideration of the valve hall is studied by setting up the numerical simulation model of the wall bushing-valve hall system and by selecting the friction ring spring dampers (FRSDs) as energy dissipation device. The multiple stripes analysis (MSA) method is adopted to obtain the vulnerability curves based on strength criteria before and after the seismic action. The results show that the axial and horizontal displacements of the wall bushing are mainly affected by the valve hall structure. The seismic response is reduced significantly after adopting FRSDs for seismic reduction. The damage probability of the inner and outer bushing of the wall bushing before and after seismic reduction is reduced significantly. The valve hall mainly affects the horizontal displacement response of the wall bushing under the seismic action and the vulnerability of the structure under the seismic action is higher. The FRSDs scheme effectively reduces the stress and vertical displacement response and significantly improves its seismic vulnerability.