Reference electrode provides reference potential signals for potentiostat, its performance has direct effect on accuracy of potentiostat measurement system. In engineering practice, developed is a recyclable reference electrode. Through adding circulating system, such reference electrode can effectively solve such issues commonly occurring in reference electrode operation as flow empty phenomena of saturated copper sulfate solution, internal solution running dry and solution being contaminated and it can supplement copper sulfate solution in time and replace internal reference solution periodically. Ceramics with high density is used for ion exchange channel to reduce solution loss and improve service life of the reference. Applied is spiral copper electrode to increase reaction area of ion and copper electrode and make the reference potential more stable.