The utility model belongs to the technical field of building materials permeate water, especially, it is used for the road surface to permeate water and the compound porous disk of drainage to relate to one kind. For solving the unbalanced problem of the ability of permeating water of depositing the water yield and lower floor that has the earth's surface in the current structure that permeates water. A compound porous disk, is including the superficial layer and the structural layer that permeates water of permeating water, permeate water be equipped with in the superficial layer by first aggregate and adhesive closely the first slit that generates of bonding describe the passageway that permeates water, permeate water be equipped with in the structural layer by second aggregate and adhesive closely the second slit that generates of bonding describe the passageway that permeates water, first slit form permeates water the passageway and is less than the second slit form passageway that permeates water, is the particle diameter of first aggregate 0.315 1.25mm, is the particle diameter of second aggregate 1.25 9.5mm. The utility model discloses a compound porous disk can effectively balance the unbalanced problem of the ability of permeating water of depositing the water yield and lower floor on earth's surface, can effectually prevent the channel blockage that permeates water.