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This paper uses the input-output model to analyse the economic and energy consumption impact of China's construction investment in 2015, and finds that it can drive economic growth of 15.11 trillion in total, with direct and indirect impacts of 27.22% and 72.78% respectively ， and investment can actively promote the development of integrated services and finance and insurance sectors. Additionally, the direct energy consumption caused by the investment is 20.98Mtce, accounting for only 1.23%, while the indirect energy consumption is 1701.10Mtce, accounting for 98.77%, of which the largest energy consumption sector is the industry of Production and supply of electricity and heat, the industry of Metal smelting and rolling processing, the industry of non-metallic mineral products, indicating that the construction industry development of china has a strong dependence on traditional energy sources. In the future, we are supposed to focus on indirect energy consumption in the construction industry and formulate morae effective clean energy-saving policies.