Abstract: The high-quality development of county economy is an inevitable requirement of Chinese-style modernization. For a long time, China's county economy has bottle-neck problems in three aspects which cannot meet the requirements for the common prosperity for all, i.e., the insufficient investments in the county infrastructure and serious brain drain; the uneven levels of county economic development and difficult industrial transformation and upgrading; the lower efficiency in the use of county resources and incompetent economic radiation drive capacity. Under the impact of the domestic and foreign economic downturn and the outbreak of novel coronavirus infection, China's county economic development is faced with more difficulties. The county-level finance is an important foundation for county economic development, and the healthy operation of county finance plays a key and fundamental role in promoting the high-quality county economic and social development. However, China's county finance is obviously insufficient to support county economic development, mainly in terms of weak revenue growth, increased expenditure pressure, prominent local debt risks, and so on. In order to strengthen the financial foundation of counties and promote the high-quality development of county economies, this paper suggests to take measures from the following four aspects: the first is to reform the financial system and mechanism, increasing the income of urban and rural residents, and laying the foundation of common prosperity; the second is to promote the transformation of county industries, enhancing the vitality of county economies, and widening the sources of county finances; the third is to improve the fiscal policy and system, strengthening the management of financial income and expenditure, and improving the efficiency of financial funds; and the fourth is to strictly manage local debts, preventing the risks of local debts, and ensuring county economic security.

Key words: Chinese-type modernization, county economy, high quality development, fiscal policy