A prefabricated house is a prefabricated part that is assembled on site and is called a prefabricated building. According to the form of prefabricated components and construction methods, it can be divided into five types: block building, plate building, box building, skeleton plate building and rising slab building. With the development of modern industrial technology, building houses can be manufactured in batches like machine production. As long as the prefabricated building components are shipped to the site and assembled, it becomes. Assembled buildings began to attract people's interest in the early 20th century and were finally realized in the 1960s. Britain, France, the Soviet Union and other countries first tried. Due to the rapid construction speed of the prefabricated buildings and the lower production costs, they are quickly promoted throughout the world. The earliest fabricated buildings were dull and stereotyped. Later, people made improvements in design, increased flexibility and diversity, and made prefabricated buildings not only build in batches but also in rich styles. In the United States, there is a kind of mobile home, which is a more advanced assembly building. Each residential unit is like a large trailer. It only needs to be pulled into the site with a special car, and then lifted onto a floor mat and embedded by a crane. A good waterway, power supply and telephone system can be used together. The interior of the mobile home has heating, bathroom, kitchen, dining room, bedroom and other facilities. The mobile homes can be combined into one unit and they can be connected to each other.