The invention belongs to the technical field of epoxy resin preparation and discloses an epoxy resin seepy material and a preparation method thereof and application. The epoxy resin seepy material is prepared from, by weight percentage, 5-35% of epoxy resin, 5-30% of modified self-emulsifying epoxy hardener, 0.5-3% of polyether polyamine, 0.5-3.5% of epoxy resin accelerator, 1-3.5% of epoxy resin diluent, 35-10% of water and 53-15% of inorganic filler. The modified self-emulsifying epoxy hardener is ricinoleic acid and/or fatty polyamine and/or alicyclic polyamine modified by a polymer of the ricinoleic acid. The epoxy resin seepy material has excellent seepy and breathable performances, the pore diameter of the epoxy resin seepy material is smaller than 20 [mu]m, the porosity is larger than 20%, the water absorption rate is larger than 20%, the pore diameter distribution is uniform, the surface is bright and clean, and the epoxy resin seepy material can be used for manufacturing ceramic industry slip casting dies, filter materials and air purification materials.