It is a new concept of environmental-economic mixed housing, is a framework for Cyclobalanopsis and sandwich panels for building materials. The buildings connect by bolt. And it can be easily and quickly assembled and disassembled sever times without damage. All the steel components are painted and anti-rust which can be normally used for more than 10 years. it is a high efficiency, energy-saving, environmental protection, sustainable green building system.. Producing design and mechanical construction of the light steel structure houses have the features that can greatly save contracture time and increase usable space. Quick construction: The construction speed is very fast. The installation within two weeks and rough decoration standard can be achieved in about one month. Light weight: it is light weight, only 1/4 weight of concrete structure. Increase usable space: The light and thin walls and beams improve the utilization rates of houses. Defensive ability: Can defense to natural disasters, such as earthquakes, hurricanes. The structure is safer and more reliable. various designs can be provided to meet customers’ satisfaction. It can be used in various residential styles, such as villas, multi-storey buildings, workshops, sentry boxes. And it also can be used in adding an extra floor on existing buildings, re-roofing.