As an essential and exciting topic in financial management, MCDM has been widely used in evaluating financial performance to improve the suitability and reliability of financial indicators with respect to the impacts of both qualitative and quantitative information. This chapter aims to present a hybrid MCDM approach to evaluate the Vietnamese banking sector's performance under COVID-19 impacts. The proposed method utilizes The Criteria Importance Through Intercriteria Correlation (CRITIC) technique to determine objective weights of financial ratios. Decision-Making Trial and Evaluation Laboratory (DEMATEL) method is employed to obtain the cause-effect relationship and the subjective weights based on experts’ judgments. Bank alternatives’ ranking is estimated using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) approach. The empirical data of 23 Vietnamese commercial banks gathered from 2019-Q3/2020 is illustrated. The results of this chapter show that the COVID-19 pandemic has significant effects on the quality of assets, the liquidity of banks, and the growth rate. When the economy slows down, banks face the challenge of keeping up with demand and raising additional resources to balance the situation. For better intelligent risk management systems, faster digital transformation is needed for the Vietnamese banking system. Furthermore, the proposed method offers useful insights and is applicable to many businesses, proving helpful in dealing with complex criteria problems for stakeholders.