Data security is not only to consider administrative management methods and punitive measures, but also technically from multiple perspectives such as data integrity, authorization, controllability, and the ability to trace back history. This article analyzes the application of blockchain technology to the data processing security system of financial enterprises, with the purpose of demonstrating the feasibility of blockchain technology to maintain data security and its specific operation methods. This research refers to a large number of references and understands the related systems of data confidentiality in financial enterprise databases and blockchain technology. According to the needs of the experiment, the article constructs the execution structure model of the financial enterprise database data confidentiality system, the task scheduling operation structure model, and the block. The chain domain authentication model, and so forth, carried out corresponding comparative analysis from the processing dimensions of time and space consumption, data security, and so forth, and verified the comprehensive performance of blockchain technology in the application of data security systems. The reliability factor is called the R factor, which is a parameter representing the degree of conformity of several curves, that is, the reliability degree of the assumed model structure. The R factor should be sensitive to the position of surface atoms but not to unstructured quantities, such as electron-atom scattering field, electron decay, and so forth, which are all unstructured quantities. The experimental results show that before the participation of blockchain technology, the maximum reliability of financial data is only 4.3, and the reliability of data confidentiality after application is increased to 6.8. Multidimensional data shows that blockchain technology can provide guarantee for the application of data processing security systems for financial enterprises.