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Under the background of economic system reform and the continuous transformation of financial functions, the implementation of financial fine management has become the mainstream direction of reducing cost, increasing efficiency and sustainable development of feed enterprises. The paper takes the t-3 financial data of 20 feed listed enterprises in Shenzhen and Shanghai in 2020 as the research sample to explore the applicability of PCA-SVM model to financial fine management of feed enterprises. It is found that PCA-SVM model effectively integrates the advantages of PCA and SVM model, eliminates the linear correlation of sample data, reduces dimension and significantly enhances the classification ability and generalization of financial fine management of feed enterprises. And PCA-SVM model has good applicability for measuring the financial fine management level of high-dimensional data and small sample feed enterprises, which can provide reference for financial managers. Therefore, feed enterprises should strengthen the application of modern information network technology, improve the technology embedding system, strengthen the whole process control and improve the application level of PCA-SVM model in financial fine management. [ABSTRACT FROM AUTHOR]