The "Belt and Road" is an important development initiative made by Chinese government, coordinating the domestic and international situation, aiming at encouraging the extension of global value chains and promoting regional economic development. Since its introduction in 2013, it has attracted the attention of domestic and foreign scholars and has produced rich and insightful academic results. In this paper, we compare and analyze the differences between domestic and international researches on the "Belt and Road" in terms of publication number, cooperation network, research content and trends. This article aims to provide academics and practitioners with a bibliometric overview of the "Belt and Road" field. To ensure high quality visualization results, irrelevant papers such as conference abstracts, newspaper and book reviews were excluded. And finally, 15916 research literatures derived from CNKI and 1265 articles from Web of Science Core Collection, published from October 1st, 2013 to October 31st, 2020 were analyzed by the CiteSpace with regards to cooperation network and keyword co-occurrence network. The findings of this paper are as the followings. 1) In the author cooperation network, the domestic authors have a weak cooperation relationship, and mainly focused on the cooperation relationship between China and the countries along the "Belt and Road"; the oversea authors have a slightly stronger cooperation relationship with each other, and mainly focused on the port transportation network of the Maritime Silk Road and the development situation of China at home and abroad. 2) In the institutional cooperation network, both domestic and international research institutions have more cooperative relationships. The top four domestic institutions of publication number are Chinese Academy of Social Sciences, Renmin University of China, Jilin University and Peking University; and the top four international institutions of publication number are Chinese Academy of Sciences, University of Chinese Academy of Sciences, Zhejiang University and National University of Singapore. 3) In the national cooperation network, China, Russia, South Korea and Canada are the countries with the earliest attention to the "Belt and Road" research; the countries with higher publications are China, USA, Russia, the United Kingdom, etc.; Switzerland, Italy, Sri Lanka and Australia are the most frequent cooperation with other countries. 4) In terms of research scope, the key words of the topic in 2015 began to cover various research areas, involving "trade facilitation", "regional economy", "geopolitics", etc. As time goes by, the keywords also cover "global governance", "cultural industries", "energy consumption", etc. Relatively speaking, the scope of domestic research is broader, involving "a community with a shared future for mankind", "opening up", "cultural communication", etc. 5) In terms of research trends, domestic keywords are mainly related to regional economic research, and the current domestic research is more concerned with agricultural trade and talent cultivation; and the keywords of international studies are mainly related to the world economy and global governance.