Sintered water permeable brick prepared from recycled aggregate with composite structure

The invention discloses a sintered water permeable brick prepared from recycled aggregate with a composite structure, belonging to the technical field of novel building materials. The sintered water permeable brick is a composite blind-hole sintered water permeable brick composed of a brick body and blind holes, wherein the blind holes are evenly distributed in a base body on the lower middle portion of the brick body along the center line of the bottom face of the brick in a long edge direction, openings of the blind holes face downwards, and the blind ends of the blind holes are located below the top face of the brick and at positions with away from the top face by a distance of about 20-30% of the thickness of the brick. The brick body is composed of an upper filtering permeable layer and a lower permeable layer which are different in formula, and the upper layer and the lower layer are made of forming materials with the same color or different colors and different aggregate granularities respectively, whe