The morphological index and main nutrient component in mature fruit of wild Kadsura ananosma Kerr from Xishuangbanna of Yunnan were measured and analyzed. The results show that fruit of K. ananosma is aggregate berries and spherical with diameter of 11.0-16.5 cm and weight of more than 1 kg. Water content of fruit is 90% . Contents of crude fiber, crude fat, reducing sugar, protein, ash, total acids, total carbohydrates and soluble solid are 17.1, 11.3, 9.2, 5.6, 5.0, 2.3, 78.1 and 82.8 mg· g^-1 , respectively, and energy value is 1.84 kJ· g^-1 . There are sixteen kinds of amino acids, in which, there are seven kinds of essential amino acids, and total content of essential amino acids is 1.93 mg· g^-1 . Contents of mineral elements such as K, Ca, Mn and Fe are all higher, while content of Na is lower, in which, content of K is as high as 2. 22 mg· g^-1 . It is indicated that fruit of K. ananosma is big and contains rich nutrients with characteristics of high K, low Na and low energy.