Research on regional fiscal expenditure budget management based on KNN algorithm

In the social and economic innovation and development, regional financial expenditure contradiction is becoming more and more significant, the traditional sense of the financial budget system has been affected, how to scientifically save financial resources, improve the application efficiency between regions, has become the focus of attention of government departments and social residents. In the study of regional financial expenditure budget management, China applied the western concept and basic methods of performance budget management to budget management, and built a budget performance management model with Chinese characteristics, which has been reasonably applied throughout the country. Therefore, on the basis of understanding the research status of regional financial expenditure budget management, this paper deeply discusses the KNN algorithm according to the basic concept of budget performance management, and constructs the regional financial expenditure budget management with the KNN algorithm as the core. From the perspective of practical application, the new management mode is more in line with the requirements of regional financial expenditure budget management.