As output of hazelnut increases worldwide, so does the amount of by-products, leading to huge waste and environmental stress. This paper focuses on the varieties of hazelnut that have been studied more in the past two decades, and summarizes the research status of hazelnut and its by-products from the aspects of nutritional value, phytochemicals, extraction methods, biological functions and applications. Hazelnut and its by-products are rich in a variety of bioactive constituents, mainly polyphenols, which have antioxidant, antibacterial and prebiotic effects. Moreover, hazelnut shells, husks, and leaves contain taxanes such as paclitaxel, which can inhibit the proliferation of cancer cells. They are potentially good natural sources of paclitaxel compared to the slower growing yew. Therefore, it is essential to further integrate the extraction techniques and health-promoting properties of these nutrients and bioactive substances to expand their application and enhance their value.

随着全球榛子产量的增加，副产品的数量也在增加，导致巨大的浪费和环境压力。本文以近二十年来研究较多的榛子品种为重点，从营养价值、植物化学成分、提取方法、生物学功能及应用等方面对榛子及其副产品的研究现状进行综述。榛子及其副产品富含多种生物活性成分，主要是多酚类物质，具有抗氧化、抗菌和益生元作用。而且，榛子的壳、壳、叶中含有紫杉醇等紫杉烷类物质，可以抑制癌细胞的增殖。与生长较慢的红豆杉相比，它们可能是紫杉醇的良好天然来源。所以，