Based on the concepts and connotations of the urban construction and urbanization，we summarized the understanding of deepening the reform of urban construction investment and financing system and promoting the high-quality development of the new urbanization，that is，grasping the reform of investment and financing system of urban public infrastructure construction is a fundamental key issue. Mainly including，firmly grasp the fundamental of the reform of investment and financing entities and operating entities，further improve the reasonable mechanism of value compensation for urban public infrastructure products and services，grasp the direction and goals of the transformation of the urban development and investment corporations，accelerate the promotion of the urban development and investment corporations and external coordination among government departments，which has made the reform of the decentralized service more scientific and effective.