| Since the 1960s, along with the suburbanization of the United States population, Economic activity in the United States transfer to the suburbs unceasingly, And the different types of employment centers are formed at the outskirts such as industrial park, office park, mixed-park, employment corridor. This article attempts to research the characteristic of these four kinds of suburb employment centers, mainly including the process of suburbanization in the United States, the characteristics of four suburban employment centers, as well as its impact on the metropolitan area spatial structure.The introduction part mainly introduce the foundation on which the topic is chosen,present research situations at home and abroad, research methods, the purpose and the lack of this paper.The first part focuses on the process of suburbanization of employment, mainly including the push factors of suburbanization of employment, suburbanization of manufacturing, suburbanization of commercial and service industries, suburbanization of office business centers, as well as the formation of the suburban employment centers.The second part mainly expounds the main features of the four employment centers of the outskirts: the industrial park, office park, mixed-park, employment corridor, and analyze their characteristics according to some cases.The third part emphasizes analysis suburban employment center's impact on the metropolitan area spatial structure. The key point of the part is how the suburb employment centers promote the formation of the multi-central metropolitan area as well as how they cause the central cities feebly.The conclusion part summarized the whole paper, pointing out that along with the American employment's suburbanization advancement, the suburb employment centers become the product of the American suburb development, and bring the huge influence on the metropolitan area development, and cause the American metropolitan area multi-centralizations and further form mostly Metropolis continuous area; The prosperity of the outskirts is bound to affect of the economy of central cities , to have a recession. At the same time, In view of the situation in America, The author pointed out that whether in the United States or in China, the suburb development should be a harmonious process. |