In order to search for the optimum conditions of extraction of soluble solid of Jujube juice,we conducted preliminary comparison between different treatment methods of extraction,and then performed orthogonal experiment under Optimal Process Conditions by using ultrasoound and pectinase at the same time.The optimum conditions were as follow:enzyme dosage 320μL/g,adding water 5mL/g,supersonic capacity of 125 W,temperature 35℃,and time 20min.Under these conditions,the extraction rate of soluble solid of Jujube juice was 80.35%.Time of extraction and energy loss were reduced greatly,and water consumption was reduced as well,significantly shorter than that of ultrasonic extraction method.It thus proved that the combined extraction method to make Jujube juice is more effective than either ultrasound or pectinase.