The structure features and design approach for the converter valve of Ningdong-Shandong ±660 kV HVDC transmission project are introduced in detail. Considering the basic structure of the converter valve, the composition, structure design feature and functions are illustrated. Especially the structure design for valve tower and valve module are described in detail, including design for the shield structure of valve tower, suspension and support structure, valve framework, connection structure and etc. Furthermore, the seismic design and fire protection design of the converter valve are introduced.