After decades or even centuries of assembly-type architecture in the developed western countries, it has developed to a relatively mature and perfect stage. Japan, the United States, Australia, France, Sweden and Denmark are the most typical countries: Japan is the first Factories in the mass production of residential countries, the United States focus on residential comfort, diversity and personalization, France is the world's earliest industrialized countries to promote the country.

Many advanced industrialized countries abroad have developed a variety of specialized systems for assembly-type construction, such as the L plate system in the United Kingdom, the prestressed assembly frame system in France, the precast hollow formwork wall system in Germany, the prefabricated parking system in the United States , Japan's multi-storey assembly-type housing system.

According to the "Analysis of China's Housing Industrialization Development Pattern and Investment Strategy Planning Report 2018-2023" released by Forward Industry Research Institute, the global assembly-type construction market in 2016 was 157.6 billion USD, a substantial increase of over 30% from the previous year. The major Due to the rapid development of the Chinese market, the scale of China's assembly-type building market will increase by 150% in 2016. Preliminary estimates in 2017 show that the scale of the global fabricated building market has reached nearly 200 billion yuan.

At present, the major markets for assembly-type buildings in the world are concentrated in Europe and the United States. In Asia, there are mainly Japan, Singapore and other countries. In 2017, the U.S. assembly-type construction market accounted for 19.5% of the global market, Europe 25.6% and Asia 49%.

Although our assembly-type buildings started relatively late but have been growing by more than 10 years, the industry has entered a phase of rapid development under the impetus of the policies since 2013. The market share of assembly-type construction in China accounts for a large proportion of the world by 2017 Rose to 35%.

The United States started the implementation of parts construction and mechanized production during the energy crisis of the 1970s. The United States Department of Urban Development introduced a series of strict industry standards and regulations, has been in use today, and later gradually integrate the US building system. The structure of residential buildings in the United States is basically industrialized, concrete-assembled and steel-structure-based, reducing construction costs, improving factory versatility and increasing construction operability.

The prefabricated concrete standards in the United States are perfect, so the application of fabricated concrete structures is very common. North American prefabricated buildings mainly include two series of prefabricated building facades and prefabricated structures. The common feature of prefabricated components is the combination of large scale and prestress, which can optimize structural reinforcement and connection structure, reduce the workload of manufacture and installation, shorten the construction Duration, fully embodies the industrialization, standardization and technical and economic characteristics.

According to the American Association of Industrialized Homes, in 2001, the number of assembly-type buildings in the United States reached 10 million units, accounting for 7% of the total U.S. housing stock. In the United States, Canada, the structure of metropolitan residential structure to concrete assembly and steel structure-based buildings, mostly in small towns with light steel, wood-based residential system.

Europe is the birthplace of prefabricated buildings, as early as the 17th century began the road of building industrialization. After World War II, due to shortage of labor resources, Europe further studied and explored the model of building industrialization. Whether developed economically in northern Europe or western Europe or in economically underdeveloped Eastern Europe, the design and construction methods of prefabricated concrete structures have been actively promoted. Many prefabricated building design and construction experiences have been accumulated and various specialized prefabricated building systems and standards have been formed , A series of prefabricated concrete engineering standards and application manuals were compiled, which played a very important role in promoting the application of precast concrete all over the world.

In its first residential five-year plan, "Five-year Plan for New Housing Construction," formulated in 1965, Japan pointed out that the ratio of industrialized houses, that is, the rate of industrialization (industrialization rate = number of prefabricated residential units / residential construction The total number of households) to reach 15%. The result is that public housing has reached 8% and private housing has reached 4%. The 5-year plan for the construction of new houses, once again formulated in 1971, stipulated that the industrialization rate of public funds and housing should reach 28% and the industrialization rate of private houses should reach 14%.

After that, Japan promulgated the five-year residential construction plan every five years. Each five-year plan has clear policies and measures to promote the development of housing industry and improve the performance and quality. Strong government intervention and support played an important role in the development of the housing industry: ensuring the quality of precast concrete structures through legislation; adhering to technological innovation, formulated a series of guidelines and policies for industrialization of housing construction, established a unified modular standard, Solve the contradiction between standardization, mass production and residential diversification.

After 1975, the Japanese government issued two norms of "Regulations on the Recognition of Industrial Housing Performance" and "Technical Benchmarks on the Performance of Industrialized Residential Properties", which are decisive for the improvement of the industrialization level of residential housing in Japan as a whole.