The invention belongs to the field of the reutilization for building waste resource and building material and provides a preparing method for water permeable bricks by utilizing building waste. The water permeable brick comprises a base and surface layer. The raw material of the base layer comprises, by weight: 50-60% of waste raw material crushing particles, 10-20% of slag powder, 5-15% of fire coal powder, and 20-30% of water. The raw material of the surface layer comprises, by weight: 10-20% of epoxy resin, 5-15% of carbon fiber, 10-20% of fine sand, 5-10% of heat reflection material, 30-50% of cement, and 10-20% of water. After the semi-finished product water permeable brick is prepared by mixing and optimizing the configuration, the semi-finished product water permeable brick is shaped by secondary material distribution and once excitation through the intelligentized device. The building water permeable brick has advantages of high permeability, permeation coefficient >= 1.0 * 10<-2 > cm/s, high strength, flexural quality which reaches the national standard of the quality of the brick, ecology, environmental protection, non-radiation, alleviating the city heat island effect,effectively reducing the temperature of the pavement by 3-7DEG C, the texture of natural stone, alkali resistance, and changing building waste into valuables and protecting the ecology environment.