Objective To investigate the effects of Jiawei Danshen Decoction on endothelial cell ultrastructure, serum NO and ET in apolipoprotein E-knockout atherosclerosis(AS) mice;To discuss its mechanism of anti-atherosclerosis. Methods Totally 24 7-8 weeks old Apo E-/-mice were fed with a high fat diet for 12 weeks until the a mature atherosclerotic plaque was formed. They were randomly divided into four groups:model group, control group, Jiawei Danshen Decoction of low-dose group and high-dose group, 6 mice in each group. Another 6 normal C57BL/6J mice with the same strain were set as the blank grou...