The invention provides foamed ceramic waste water-permeable concrete and a preparation method thereof. The water-permeable concrete is prepared from the following materials in percentage by weight: 20-25% of cement, 26-36% of coarse aggregates, 15-30% of recycled fine aggregates, 5-10% of pulverized fuel ash, 0.1-0.5% of water reducers and 12.8-19.5% of water, wherein the recycled fine aggregates are foamed ceramic wastes with average particle size of 0.5-5.0mm. Foamed ceramic has the excellent properties of high porosity, high water permeability, high fireproof grade, low water absorption rate, high strength, high durability, high weather resistance and the like; the foamed ceramic wastes with high porosity are used as the fine aggregates, so that the strength of the water-permeable concrete can be obviously improved; meanwhile, the fine aggregates are matched with the coarse aggregates, so that the formed water-permeable concrete has multistage pores including pores between the coarse aggregates, pores between the coarse aggregates and the fine aggregates and pores in the fine aggregates; the water-permeable concrete is high in water permeability and is suitable for sponge cities.