The aim of the present study was to evaluate the changes in phenolic content, phenolic profile, antioxidant activity, and protein oxidative damage inhibition activity of oat paste after a-amylase treatment, to evaluate the effect of this treatment on the functional properties of oat-containing foods. The results is hoped to provide a useful processing way to achieve more efficient extraction of beneficial phenolics from oat products and meets the ultimate goal to improve the health benefits of oat products