Abstract: In recent years, with the progress of multi-omics and next-generation sequencing technology, the association between gut microbiome and cardiovascular diseases has attracted great attention around the world. Gut microbiota, as a "microbial organ", directly regulates the host's health status through lipopolysaccharide, metabolites like trimethylamine oxide and short-chain fatty acids, and affects the host's immunity through bacteria and their products. "Gut-heart axis" may be a breakthrough in the prevention and treatment of cardiovascular diseases. The paper briefly discusses the relationship between gut microbiome and cardiovascular diseases, the possible ways in which gut microbes affect cardiovascular health, and the regulation of gut microbiota by various factors.