Mineral leaching method and mineral leaching system for ionic rare earth mine

The invention relates to a mineral leaching method for an ionic rare earth mine. The mineral leaching method is characterized by comprising the following steps: carrying out percolation leaching on the mine by taking ammonia-free electrolyte as a mineral leaching agent, so that positive ions in the mineral leaching agent and ion-phase rare earth adsorbed on the surface of a carrier mine exchange to form a soluble rare earth compound entering the solution; loading the ionic rear earth mine in a mineral leaching exchange column, and adding the ammonia-free mineral leaching agent with the concentration of 2-5% according to the proportion of the mineral leaching agent (liters) to the mine (kilograms) being 0.6-0.8; after the surface of the mine is exposed out, adding top water according to the proportion of the top water (liters) to the mine (kilograms) being about 0.2; and draining away a residual solution in the mineral leaching exchange column fundamentally, namely ending mineral leaching work. The mineral leaching method is high in mineral leaching efficiency, and can prevent the pollution of ammonia nitrogen to the environment.