Leaching method also has an impact on the leaching effect, the current common leaching methods are: static leaching, heap leaching, balanced leaching, column drenching. The leaching efficiency is generally: column drenching > equilibrium leaching > static leaching. This is due to the on-column drenching, leaching agent solution under the action of its own gravity, top-down contact with the solid phase several times for ion exchange, the process is a dynamic equilibrium, exchange after the separation of products, exchange more fully. On-column drenching usually uses a sample volume ranging from a few tens of grams to several kilograms, depending on the size of the filled column. On-column drenching is influenced by the degree of filling uniformity, the granularity of the mineral sample, the degree of filling compaction, the height of the filled column, etc. The degree of filling uniformity determines whether the leaching agent has gully flow, bias flow, etc., thus making some ore samples over-leached and some unleached. Tian Jun et al. reported that the ore particle size has a great influence on the leaching rate and the leaching rate of rare earths decreases with the increase of particle size. Large granularity has more pores, fast leaching agent flow rate, and insufficient leaching agent exchange; small granularity, sufficient leaching agent exchange, but slow flow rate, the existence of re-adsorption phenomenon, and serious tail dragging. The loading column height is similar to the column efficiency theory of chromatographic column, the column height determines the theoretical tower plate number, i.e., the number of cycles of adsorption-desorption, but the column drenching is significantly different from the larger the column height of chromatographic column when the injection volume is certain. When the solid-liquid ratio is fixed, the effective exchange of solutions is limited, and the first part of the solution can effectively participate in the exchange, after the solution exchange is limited, and the increase of the filling column is limited. The compaction of the filling and the particle size of the sample affect the height and porosity of the filling column, thus affecting the flow rate or the height of the leaching peak and the sequence of the peak time. Equilibrium leaching uses equilibrium oscillation to exchange to reach equilibrium, and is usually used to study the thermodynamic model of ion-adsorption rare earths, adsorption model, etc. The amount of ore samples used is within a few tens of grams, and most of them are screened clay minerals, and the control of ore sample type, temperature, leaching time, etc. is simple and easy to study. The equilibrium leaching method to study the efficiency of leaching needs to be further standardized.