Abstract: In order to explore the influence of channeling on the distribution of the meso-seepage field inside the leaching reactor, the meso-scale ore accumulation structure in the reactor is obtained based on nuclear magnetic resonance technology, and the seepage field under the influence of channeling is numerically simulated by CFD software.The influence of spray intensity and channeling coefficient on flow field distribution is analyzed.The results show that the solution inside the ore flows slowly under the action of channeling.The exchange of the solution at the ore-liquid interface expands the range of the seepage field, increases the reaction time of the solution in the leaching pile, makes the solution fully contact with useful minerals, and improves the usefulness.The leaching rate of the substance, the flow velocity at the slow flow zone and the exit boundary increases, the velocity of the fast flow zone decreases, and the swirling flow increases.Under the effect of channeling, the increase of spray intensity can promote the flow of solution in the seepage field and increase the vortex range.The increase of the channeling coefficient helps the flow field to be evenly distributed, the flow in the slow flow zone is accelerated, and the flow velocity in the fast flow zone is reduced, which can inhibit the occurrence of dominant flow to a certain extent.