Abstract:Using dry Lycium ruthenicum Murr as raw material，preparate the concentrated juice of the anthocyanin of Lycium ruthenicum Murr and analyze the factors affecting the quality of Lycium ruthenicum M，urr extract，Using ultrafiltration and hyperfiltration technology and according to the changes of anthocyanins and soluble solids content in Lycium ruthenium before and after concentration to obtain optimal process condition.The results showed that the optimum rate of rehydration of dry fruits was 1∶6（g/mL）.The content of soluble solids in Lycium ruthenicum Murr juice was enhanced by enzymatic hydrolysis.Best conditions of enzyme hydrolysis were determined as follows：The addition amount of pectinase was 0.06%，and cellulose enzyme was 0.01%，the optimum enzymolysis temperature was 30℃，and optimum enzymolysis time was 90 min.Choosing 20 nm ceramic membrane as ultrafiltration membrane，the optimum ultrafiltration temperature was 30℃ to 40℃，and pressure was 0.1 MPa.The optimum conditions of hyperfiltration as follows：temperature was 40℃，and the pressure was 4.0 MPa.