The construction of financial service system to support green technology innovation in the report of the nineteenth national congress as a key goal to promote the direction of green development pointed out that the expansion of energy conservation and environmental protection industry, green energy industry, green production industry. In the meeting, we put forward the financial service system to support green technology innovation, recommend the development and construction of ecological civilization, promote the harmonious development of society, and improve the quality of green technology innovation. Based on the guidance report and opinions put forward in the 19th cpc national congress report, this paper analyzes how to effectively construct the financial service system to support green technology innovation, combining with domestic and foreign experience.