Artichoke is a kind of vegetable with liver protection， anticancer， antioxidation and antibacterial activity， its by-products （leaves and stalks） also rich in beneficial physiological activity， but it is difficult to make intensive use of the by-products as they are too wet to be decay. In this study， silage， a low energy method， was use for storaging artichoke stems and leaves， meanwhile， the content of polyphenol and its antioxidant properties and the ability of inhibition of α-glucosidase was detected in ensile. In short， the changes of mono-phenols was detected by HPLC-QQQ-MS， and the alteration of total phenolic content in ensilage was determined by with Folin-Ciocalteu method. Meanwhile， antioxidant properties and the ability of inhibition of α-glucosidase was regarded as evaluating indicator of function activity. As result， there are still 96.8% of total polyphenol in the by-product after ensiling. Moreover， antioxidant properties is same to before， and the ability of inhibition of α-glucosidase is still significant. Consequently， ensilage can be a developed method to preserve the polyphenol of artichoke by-product and function activity as before， so it is a low energy and efficient method to preserve the by-products of artichoke stem and leaf that has potential for popularization.