Abstract: Nine wild sour jujube（Ziziphus acidojujuba C.Y.Cheng et M.J.Liu） germplasm（N1-N9） from the western region of Inner Mongolia were used as experimental materials.Traits of three commercially available sour jujube from Shanxi, Shaanxi, Xinjiang Provinces and Jinsi jujube from Cangzhou city and Hebei Province were used as controls to compared with the experimental materials.Thirteen fruit phenotypic traits and four nutritional traits were tested, and high-quality fresh edible sour jujube germplasm were screened based on grey correlation analysis, in order to provide reference for the development and utilization of sour jujube germplasm in Inner Mongolia.The results showed that the quality of a single fruit of sour jujube was directly proportional to the transverse diameter of the fruit and the transverse diameter of the fruit pit; the highest fresh edible rate was N6（68.55%）,which was higher than Shaanxi（45.30%）,but lower than Shanxi（77.35%）,Xinjiang（82.33%）,and Jinsi jujube（93.57%）.The fruit flavor characters of N1,N3,N4,and N6 were more stable than those of the controls.N6 and N9 were favorable in sweet and sour fruit flavor.The soluble protein content of N4(2.13 mg·g^-1·FW) and N7(2.19 mg·g^-1·FW) was higher than that of the control.The germplasm that had highest soluble sugar content was N1(208 mg·g^-1·FW) which was lower than the control.N7(726 mg·（100g）^-1·FW)had the highest vitamin C content which seven germplasm resources had higher vitamin C than the control.The germplasm had lowest titratable acid content was N6（6.67%） which was higher than the control.Through the comprehensive evaluation using grey correlation analysis, N7 was suitable to be developed and utilized as an important breeding material for high-quality freshly edible sour jujube.