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Background The number of migrant elderly in China and abroad is rising, and their mental health problems can no longer be ignored due to mobility-related adversities. Objective To analyze the current situation, research hotspots and trends in the field of mental health of migrant elderly at home and abroad in the past 10 years based on CiteSpace, and provide reference for research in related fields. Methods CNKI, Wanfang Data, VIP, CBM, Scopus, PubMed and Web of Science Core Collection were used as data sources, and CiteSpace was used for visualization and analysis, including publication volume, authors, institutions and keywords. Results A total of 1 023 papers were obtained, 726 in English and 297 in Chinese. Domestic authors mainly collaborated with the same institution, while there were more inter-institutional collaborations abroad. The current research hotspots mainly focused on the elderly with migration, elderly immigrants, old migrants, depression, psychological distress and social support. Conclusion Compared with abroad, there are fewer publications in China currently, with looser cooperation among research authors and institutions, and a lack of core authors, needing more diversification of disciplines and research methods. Focusing on hotspots and cutting-edge content, exploring the mechanism of the role of mental health of migrant elderly, implementing psychological interventions, strengthening health education, and improving the psychological resilience and subjective well-being of migrant elderly are the main trends of future research.