In order to solve the angle problem of installing semi-circular structure using crane barges on high foundation, this paper puts forward the innovative technologies of installation, according to the current situation of little experience and a specialized construction equipment. Using double hook-single hook device and joint board to control the installation space, and using a/4 to control the deviation of longitudinal axis correction between adjacent semi-circular structures, we can ensure the construction schedule and construction quality, serving as a reference for similar projects.