Coronavirus disease 2019 (COVID-19), caused by SARS-CoV-2 (severe acute respiratory syndrome coronavirus-2), has been spreading rapidly internationally. On the one hand, there is a certain correlation between the basic cardiovascular disease and the severity of COVID-19; on the other hand, the patients with severe and critical COVID-19 often have cardiovascular system-related clinical manifestations. This article reviews the interaction between COVID-19 and cardiovascular system, and the cardiovascular problems that may be encountered in the diagnosis and treatment of COVID-19.