The 1.8 km-diameter Xiuyan crater is located in Xiuyan County of Liaoning Province. The basement rock of the crater is made up of the Early Proterozoic metamorphic rocks composed of granulite, gneiss, hornblendite, tremolite marble, marble and so on. Quartz from the impact breccia filling in the inner crater shows typical features of shock metamorphism, including the planar deformation features (PDFs) along the crystallographic orientation of quartz on(0001), {1011}, {1012} and {1013} and so on, as well as the occurrence of silica glass and coesite formed through phase transformation of quartz. The existence of coesite and PDFs in quartz provides diagnostic evidence for shock metamorphism of minerals in Xiuyan crater.