Abstract: The ursolic acid was extracted from Xishan jujube with ultrasonic extraction technique. The ingredients and contents in the extracted solution of ursolic acid were analyzed by HPLC and IR. The extracting technology was optimized by single factor experiments. The results showed that: the optimum condition for ursolic acid extraction was: extracting temperature as 65℃, extracting time as 25 min, material to solution ratio as 1:13, ethanol concentration as 85% and extracting power as 175 W. Under the above condition, the extraction ratio of ursolic acid reached 2.22 mg/g. Compared with the extraction without ultrasonic, the extraction ratio of ursolic acid was improved with less energy consumption and shorter extracting time. The research provided evidences for the utilization of Xishan jujube resources and the development of new jujube processed products.