A deep understanding of tax avoidance practices can offer a theoretical basis for mitigating the negative impact of investment inefficiency on firms. However, current research on tax avoidance and investment decisions often focuses on specific studies and lacks a comprehensive perspective. In this study, we analyzed 16 years (2008-2023) of publications on tax avoidance and investment efficiency from the Scopus database using bibliometric methods. Our findings indicate a significant increase in the number of published articles over recent decades. The United States, China, and the United Kingdom have been the most prolific contributors to this field. Additionally, several leading journals dominate the field, and there has been substantial collaboration among authors, providing diverse insights and perspectives. Our analysis reveals that tax avoidance affects investment efficiency through various factors, including the quality of accounting information, managers ability, corporate governance, and public policies. By examining keywords, we have identified current research trends and offer recommendations for future research directions.