Nanjing Jinling Power Plant Dome Coal Storage request a space structure with large span, we apply high-altitude cantilever installation construction technology on mini-crane on the installation of the dome;firstly we assembly the part space frame into some small units on the ground,then process the connection of nodes by high-altitude workers and carry on the space of whole full joint displacement; the construction method make the whole process economical,practical,convenient efficient and less safety issue;