In the context of intensifying global competition, the exploration of corporate tax strategy is emerging as a pivotal area within financial management. This paper develops a flowchart for a tax planning scheme tailored to the economic strategy of multinational corporations. It examines the tax planning approaches related to enterprise financing strategy and capital operation strategy, identifying the optimal tax planning scheme based on two primary service objectives outlined in the flowchart. An empirical analysis is conducted using the case of H Communication Company to investigate the tangible benefits of its tax strategy on international financial management during its multinational operations. The results demonstrate that following tax planning, the coefficient for the cross-term of the multinational company’s earnings per share stands at 0.8340, suggesting that the market has positively received the company’s effective tax avoidance measures. This study not only advances practical research on tax planning for multinational projects but also serves as a dual theoretical and practical reference for the operations of multinational enterprises.