Abstract: Converter transformer area is the core area in ±800 kV UHVDC converter station, and it is also the focus and difficult part for the station design. According to the engineering technical conditions of the Hami ±800 kV converter station project, the structural design characteristics of the main buildings and structures in the converter transformer area are introduced. On the basis of the experiences in design, construction and operation of the ±800 kV converter stations that have been put into operation in China, the structure type selection and implementation scheme for the mian buildings in the ±800 kV converter transformer area, including the valve hall, cable interlayer in control building, insulated room for air cooler, converter transformer foundation and railroad foundation, and the incoming-line frame for the converter transformer are summarized in the principle of advanced technology, reasonable economy, safe, reliable and convenient construction, which can be used as a guidance and reference for the structural design of the future UHVDC converter stations.