In this paper, potentiometric titration is used to study the leaching performance of ion-adsorbed rare earths, which is different from the common oscillatory equilibrium leaching. Unlike acid-base potentiometric titration which has obvious mutation points, the potentiometric titration of leaching agent has no obvious mutation points except the initial point and the appearance of the color remains unchanged, so it is impossible to judge the end point of titration directly. The change of Zeta potential reflects the change of internal charge of clay minerals slip surface, which is the result of the joint action of anion and cation. The clay minerals generally have a negative skeleton charge, when the clay minerals adsorb more cations, the more negative charges are offset, and the negative value of Zeta potential decreases. When the rare earth content changes, there must be ions involved in the exchange, and the zeta potential generally changes. For this reason, by determining the content and concentration of the leaching agent added drop by drop and the leaching amount of rare earth ions, the correspondence will be able to evaluate the leaching performance of the leaching agent at different concentrations. In addition to the determination of the rare earth content, the ion-adsorbed rare earth minerals were titrated by potentiometric dip leaching to monitor the changes in zeta potential, pH and conductivity during the leaching process and to provide a basis for the interpretation of the ion exchange process. drenching pH Abrasion pH: Take 20.00 g of the screened mineral sample below 20 mesh and deionized water mixed in the ratio of 1:4 by mass, put it in a 250 ml beaker, put it on a multi-head magnetic stirrer and stirred for 30 min, set the speed to 1000 r/s, and then filtered, take the clarified filtrate, and determine its pH value as the abrasion pH value.