The rise of mobile Internet has not only changed the business model of many enterprises, but also had a profound impact on the financial management model of enterprises. Based on this, this paper applies blockchain technology to enterprise financial management, using decision trees and information entropy alignment to optimize and promote its digital transformation. Regarding optimizing financial management processes, blockchain technology converts the enterprise’s financial management data into a distributed ledger. It integrates it with information entropy to create a digital financial data decision tree. This paper takes enterprise A as the research object, after optimizing the financial management process with blockchain technology, enterprise A’s financing ability is enhanced, and the current ratio as a whole maintains an upward state, reaching a maximum value of 0.86 in 2021, and then it has been maintained at about 0.8, indicating that the optimized short-term solvency capacity has been significantly improved. The total debt amount of enterprises is decreasing yearly, falling to 35.26 billion yuan in 2023. The amount of owners’ equity has shown an upward trend and has remained at a high level of 25 billion yuan since 2021. Therefore, blockchain technology strengthens the financial management capabilities of enterprises and explores a feasible path to reduce investment risks.