Abstract:The prevalence and mortality of cardiovascular disease in China is still on the rise, and the mortality rate of cardiovascular diseases ranks first, higher than tumors and other diseases, accounting for more than 40% of the deaths of residents. This article mainly discusses the relationship between vitamin D deficiency and cardiovascular risk factors (dyslipidemia, obesity, hypertension, diabetes mellitus), and its effects on common cardiovascular diseases such as coronary heart disease, heart failure, atrial fibrillation. At present, some observational studies and some animal experiments show that vitamin D may protect the cardiovascular system, but the existing clinical experimental evidence does not support the vitamin D to benefit or harm the cardiovascular.