Abstract: The main objective of health benefits assessment is to provide regulators and the public with comprehensive and up-to-date information on the social benefits and costs of an environmental protection actions and policies. This includes assessing the impact on human health, extent of environmental pollution mitigation, improvement of ecological resources, and economic implications. To gain insights into the current research trends and hotspots in health benefit assessment, a review of the literature published from 1990 to 2022 was conducted using bibliometrics and Citespace software. The analysis covered publications from CNKI and Web of Science core datasets. The results indicate several key findings. First, the number of publications in the field of health benefit evaluation has increased steadily over the past 30 years. The growth has been significant since 2015, with the United States and China having the highest number of publications. Moreover, the United States leads in research activity in this field. Secondly, research findings related to health benefit assessment are published in top-tier journals such as Science, Lancet, Environmental Science & Technology, and Environmental Health Perspectives. The most prolific research organizations in this field are the US Environmental Protection Agency and the Chinese Academy of Sciences. Additionally, there are a lot of collaborative exchanges between countries. Lastly, the research focuses on the effects and benefits of reducing air pollutant emissions, as well as the health risks and disease burden of exposure to particulate matter. Urban green space planning is also a prominent research area. The findings highlight similarities in the research directions and context of health benefit assessment domestically and internationally. The filed is in an active development state, with a strong emphasis on the mitigation effect of environmental pollution, air pollution and human health, and cost-benefit analysis of policies. The future research trends identified include investigating the synergistic benefits of reducing environmental pollution through policy implementation, exploring the effect of greenhouse gas emission reduction actions, and assessing the health risk assessment and control cost associated with emerging pollutants.