Based on the CiteSpace econometric analysis visualization software, 645 papers related to the ecological security of urban agglomeration published in the years 2003-2017 and found in the CNKI(China National Knowledge Infrastructure) and WOS(Web of Science) databases were taken as study objects to research the development status and situation of urban agglomeration ecological security at home and abroad. It was found that the amount of research on ecological security of urban agglomeration at home and abroad has been fluctuating in the past fifteen years. Since 2008, domestic scholars have increased the number of theses, documents, and authors' citation frequencies in foreign periodicals year by year. The international research on ecological security of urban agglomeration was dispersed over the past years; there were few very common key words. Domestically, the research network was complete but lacked cutting-edge branches, and had no complete framework for a research system. "Sustainable development" had the highest emergence frequency, "ecological security" had the longest duration, and "PSR model" was the most recent frequently used term. The terms "urban ecological security pattern" domestically and "pollution and growth" abroad were the research hotspots for ecological security of urban agglomeration. On the whole, the research on ecological security of urban agglomeration emphasizes multidisciplinary and multi-angle theoretical basic research. It focuses on the synergy of internal mechanisms and external construction and the combination of static and dynamic measures to evaluate and analyze the safety of the system, thus constantly moving towards network and ecological security management may become the key direction and angle in the future.