The paper retrieves literature about the link between Obstructive Sleep Apnea Syndrome (OSAS) and cardiovascular disease from the Web of Science Core Collection, conducts analysis in the aspects of author, quantity of issued paper, distribution of country/institution, citation, keywords,etc. It also builds a knowledge graph by using CiteSpace software, then probes into the hotspots and the cutting edge of the field in the expectation of providing some reference for relevant studies.