Since the 1950s, the trend of the regional integration around the world is increasing under the background of globalization. As Tianjin and Beijing are two well-developed cities in the Beijing-Tianjin-Hehei area, Beijing-Tianjin integration can to some extent reflect the Beijing-Tianjin-Hebei integration, provides the basis for the area development of Beijing-Tianjin-Hebei. With the Beijing-Tianjin area as a ease, this article analyzes the situation of the market integration, the industrial integration and the space integration based on the process of regional economic integration, The research indicated that the process in this area has developed slowly from 1985 to 2007, according to ＂the price law＂. The analysis of location quotients of industry and tertiary industry, shows that two cities don＇t make fall use of the industrial supplementary potential. Even thou~ the space integration of Beijing and Tianjin had strong advantage and the traffic infrastructures were welldeveloped, the research indicated that the process in this area developed slowly from 1985 to 2007 and was still at a relatively early stage. In the future, through policy guidance, rational distribution and the overall planning, Beijing-Tianjin integration is supposed to develop well and becomes one of the main driving forces of regional economic development.
China Polulation.Resources and Environment