In recent years, the study of children's subjective well-being has garnered escalating global attention, with its research themes becoming increasingly diverse. However, this field still lacks a systematic review and analysis. Drawing upon the Web of Science database, this study retrieved 32,112 relevant articles published between 2003 and 2022, focusing on the theme of children's subjective well-being. After rigorous screening, 23,711 publications were ultimately retained for analysis. Utilizing bibliometric methods, this study conducted network visualization analysis across multiple dimensions, including countries, institutions, journals, authors, and keywords, aiming to comprehensively reveal the current research landscape of children's subjective well-being. Furthermore, theme modeling techniques were employed to delve into the patterns of theme evolution, and cluster analysis was conducted to categorize related themes. Through qualitative analysis, this study uncovered the developmental trajectory and future research directions in the field of children's subjective well-being. The findings indicate that, in the realm of children's subjective well-being research, developed countries such as those in Europe, America, and Australia have contributed over 30% of the research efforts, both in terms of publication volume and impact. Among them, the United States holds a leading position. The research themes have gradually evolved from an initial focus on the children themselves to exploring their surrounding environments and further delving into the psychological impacts and well-being of children amidst public health emergencies. Notably, the outbreak of the COVID-19 pandemic has prompted scholars to delve deeper into children's well-being, shifting the focus of research from mere exploration of mental health to a more nuanced investigation of psychological impacts. Looking ahead, areas such as public health, psychological impacts, and children's dietary health will emerge as crucial directions for future exploration in the field of children's subjective well-being research, offering significant potential for investigation.