Rainwater circulation irrigation device for planting roof

The utility model discloses a planting roof rainwater circulation irrigation device in the technical field of planting houses, which comprises a ground layer, a planting house and a rainwater storage pool, the planting house is arranged above the ground layer, the rainwater storage pool is arranged below the ground layer, the top of the planting house is provided with a water collecting roof, and the water collecting roof is connected with the planting house. The rainwater collecting roof comprises a water collecting roof body, water collecting filtering grooves are horizontally formed in the two sides of the water collecting roof body, and a plurality of sets of filtering holes are evenly formed in the bottom of an inner cavity of each water collecting filtering groove, so that rainwater can be collected into the inner cavities of the water collecting filtering grooves through the inclination of the water collecting roof body, and after being filtered through the filtering holes, the rainwater can be collect