Objective To investigate the effect of sweet almond peptides on the endothelial function of human umbilical vascular endothelial cells (HUVECs) .Methods HUVECs were treated with different doses of the almond wholly peptides and the almond glutelin peptides (150 ,300 and 600 μg · mL-1 ) ,and then the growth experiment of cells was carried out and the amount of NO and ET in culture media were measured .Results Almond wholly peptides and the almond glutelin peptides could significantly inhibit the HUVEC growth ,promote the NO releasing and reduce the ET level(P<0 .01) ,and significantly antagonize the effect of noradrenalin .Conclusion The sweet almond peptides ,especially the almond glutelin peptides ,have strong protective action on the endothelial function of HUVECs .