Abstract: Technological progress can be a considerable driving force to promote the development and reform of the financial industry and encourage the high-quality development of economy in China. Especially in digital economy era,FinTech 3.0 can optimize the resource allocation in financial industry,innovate the payment and settlement format of the financial industry,improve the efficiency of information collection and transmission,optimize the risk management mode of the financial industry,and provide new possibilities for the financial industry in the form of “financial LEGO”. At the same time,FinTech can help China's economic transformation by helping the high-quality development of the real economy and promoting the construction of digital industry infrastructure. While strengthening the strategic deployment of FinTech and promoting the sustainable development of FinTech,it should also attach importance to risk management and prevention and control related to FinTech,and the establishment of a regulatory system of financial industry in digital economy era.

Key words: digital economy, FinTech, high-quality economic development, efficiency, costs