Abstract: The study of porosity characteristics of ionic rare earth ore extraction is the basis and premise for improving the efficiency of mineral extraction. In this paper, the evolution law of orifice characteristics of leaching body under the physical and chemical action of leaching agent and mineral materialization was analyzed and reviewed, the standard leaching methods were investigated, and feasible improvement schemes were proposed. The results show that leaching chemical reaction, electrical double layer and seepage action influence the immersion body’s pore structure parameters and permeability evolution characteristics. Existing studies focus on leaching chemical osmosis studies. The physical facilitation methods proposed in this paper, such as splitting and grouting, can increase the ore body’s permeability and provide strong support for the mine. In future studies, it is necessary to study the porosity characteristics of ionic rare earth minerals under multi-scale and multi-factor coupling. Combine the finite element method with the discrete element method to build theoretical models for ore bodies. Moreover, in-situ mining process simulation research should be carried out under complex working conditions to further clarify the adsorption mechanism of extract particles to cations and their shedding migration characteristics.