Abstract: Digital tourism is an important engine to promote the high-quality development of tourism in the era of digital economy. In recent years, with the increase in the number of digital tourism studies, it is necessary to improve the awareness of digital tourism among academic and industry circles. With the method of literature review and knowledge graph research, VOSviewer visualization software is used to review the domestic and foreign digital tourism related literature. In the past decade, digital tourism research at home and abroad has shown a steady development trend, but the theoretical analysis and theoretical expansion are not deep enough. Combined with the visual analysis of keywords, this paper systematically summarizes the current research hotspots and themes in the field of digital tourism at home and abroad, domestic research focuses on the promotion of digital technology for high-quality tourism development, cultural and tourism integration and rural tourism development, etc., foreign research focuses more on the promotion of digital technology for social media applications, smart tourism cities and smart tourism destinations. From the micro and macro levels, this paper puts forward the prospect of future research, and provides ideas and references for the follow-up research on digital tourism.