Sponge city rainwater collecting and purifying system

The invention belongs to the technical field of sponge city rainwater application, and particularly discloses a sponge city rainwater collection and purification system which is composed of a municipal road permeable part, a rainwater collection and utilization part, a roof greening planting part, a non-point source pollution control part and an intelligent sponge detection part. The rainwater collecting and purifying system for the sponge city has the beneficial effects that the service life of a light-load full-permeable road, a heavy-load semi-permeable road and a permeable concrete pavement using an inorganic environment-friendly reinforcing agent of a permeable part of a municipal road is as long as 5 years or above, the index of compressive strength C30 or above is reached while the permeable rate of 1.2 mm/s is ensured, and the rainwater collecting and purifying system is non-toxic, harmless and odorless and has a good application prospect. Various index requirements of the road are met; and the roof g