Double-wing expansion house is also called double-wing folding house, using galvanized high-strength square tube, galvanized angle iron and other light steel materials for the frame, anti-corrosion double-sided color steel composite panels for the wall, between the frame using high-strength hinges for linking up the house after scientific calculations, able to quickly expand the space of the house. Expanded house space is nearly 3 times larger than before unfolding. We can make 20 feet, 40 feet expansion house, also can be customized according to customer needs. It is a kind of house with high technical content among the living container houses.