Przewalski′s Gazelle (Procapra przewalskii) and Tibetan Antelope (Pantholops hodgsonii) are the first-class protected animals in China, but the digestive system structure of these two species has not been reported. We anatomized 6 Przewalski′s Gazelles and 2 Tibetan Antelopes which were dead in the wild and described their digestive systems in details. We measured the length of alimentary tract and volume of the stomach (Table 1) and analyzed percentages of various segments of the intestine of gazelles (or antelopes). The schematic diagrams of the digestive system (Fig. 1 and 2) were drawn by CorelDraw X6. Rumen of Przewalski′s gazelle occupied a large proportion of total stomach volume, and the average value was 96.05%, with 79.25% and 66.67% respectively in adult and young Tibetan Antelopes. The length of small intestine accounted for 68.42% of total length of the intestine in young Przewalski′s Gazelle and 66.48% in adult Przewalski′s Gazelle; the percentages in young and adult Tibetan Antelopes were 74.67% and 83.52% respectively. Descriptions of antelopes′ digestive system have provided basic data for further understanding and deep study of the environmental adaption of digestive system in Przewalski′s Gazelle and Tibetan Antelope.