Abstract: The research of participatory budgeting has gained extensive attention from academia in recent years, and yielded fruitful academic achievements. With the help of excel, bibexcel, citespace, and through analysis of scientific cooperation, keyword analysis and citation analysis, this paper introduces mapping of knowledge into the field of participatory budgeting research and summarizes the current research situation from 2000 as follows. Firstly, although the perspective of participatory budgeting research is multivariate, with scholars from many country involved in this field, the research achievements have indicated serious gaps between the rich and the poor; secondly, the subject of participatory budgeting research is still Brazil, but the study has shifted its attention to democracy, autonomy and quality of public participation from empirical case; thirdly, although the research achievements of participatory budgeting are rich, some peripheral issues still urgently need to be addressed. On the basis of the previous study and the participatory budgeting of China, the author discusses the possible prospects of the participatory budgeting.