The current situation in the research field of crop water requirement is explored by using the methods of bibliometrics, co-citation analysis, citation network structure transformation and visualization based on the visual analysis software CiteSpace of bibliometrics. The knowledge maps of scientific cooperation, discipline development and evolution, and potential influence literatures or subject structure network in the research field of crop water requirement are drawn in order to find out the characteristics of scientific cooperation and the evolution laws of research topics, and to predict the potential influential topics and scholars. The research findings are as follows: (1)The network of institutional cooperation is very complex, and the high-temperature research areas mainly include the United States, Europe, India. (2)The research topics in the research field of crop water requirement are diversified. The research theme has gradually developed from “mariculture waste water irrigation” to seven research themes oriented by research methods and problems. (3)Through the citation network structure transformation network, it is predicted that the potential influential literatures are Jalava M(2016), Toumi J(2016)and Wang W G(2017), and the potential influential topics are the reflectance-based crop coefficient and the lpjml model. These research results may provide a theoretical reference for the relative researchers to predict crop water requirement in a certain direction.