Abstract: Based on the seismic specific indicators of steel structure buildings as specified in the code for seismic design of buildings, the seismic performance and economic efficiency of flexible DC valve halls were analysed in this treatise, with three different seismic projects. The results show that the overall seismic performance of the valve hall structure under the different seismic projects of steel bracing, buckling-restrained bracing, and viscous dampers meets the requirements of the code, and the buckling-restrained bracing scheme has better economic indicators.