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With its open policy，China economic has be developing rapidly，which makes the existed public infrastructure pressure to increase. We must increase input and build the infrastructure，but it is not enough to build the infrastructure relying on the government input. We should attract the social investor to participate in the construction，operation and management of the public infrastructure. If practicable，we can make the private capital working and realize the government，private capital，project use of party to win more.
Concession operation in financing way of project is used in foundational establishment，energy source，public establishment，petroleum and steels such large project. TOT（transfer-operate-transfer） financing models produced in the 1990s. Now the government and society investors are in favour of TOT because it doesn't involve the construction process of the project. At present，the research on the theory system of TOT financing is not perfect and is just the early stage of exploration. Integrated management，which was regarded as the product of development as well as the needs of TOT，is new theory in the field of TOT management and will make management practice up to a new higher stage. Traditional TOT management model's main defect was study limitations in some respect. Therefore，in recent years，people for project financing management research TOT，emphasize more from the point of view of integrated analysis. Based on public infrastructure project financing structure，TOT operation mechanism and function，people set up integrative TOT project financing integrated management system. The system can ensure project financing structure in TOT，running mechanism and function of the continuity and integrity，make TOT to maximize efficiency of project financing.
The articleconsiders the TOT system of the profit public infrastructure as a complex system. And on that basis，we used the theory of public goods，public infrastructure privatization theory，project distinction theory，project financing theory and integrated management theory and the case study method in the research. At the same time，the article paid close attention to the structure，function and operating mechanism of TOT financing. The article finished work including：
First，the articleanalyzed the meaning of the “profit public infrastructure” and the profit and non-profit transformation. In fact，only profit public infrastructure can be applied to the TOT financing models. The article stated the limitations of the current study on TOT through the analysis of the research status and analyzed applicability and superior of the use of TOT in our country. At the same time，the article research on the integrated management and got to a conclusion that the integrated management can be applied to TOT financing.
Second，the article used the hall three dimensions structure method，constructed the TOT financing frame of the profit public infrastructure project，and analyzed each dimension of meaning.
Third，the article definited the structure，function and operating mechanism of the TOT system of the profit public infrastructure and then deep researched on them in order to study on the integration.
Forth，the aticle used hwme method research the integration of the function and operation mechanism under the established structure and put forward the related concept model.
Fifth，the article used the model research on TOT financing integrated management of the GAO HAI highway.