Roof rainwater drainage breaking of contact structure

The utility model belongs to a roof rainwater drainage breaking of contact structure of rain drainage technology and facility system. Technical scheme does: below at outer wall rainwater riser sets up colored pond, and impervious material makes for the hua chi, delivery port drainage to surperficial contact department in flower pond of wall rainwater riser sets up the stereoplasm buffer block, bottom in the hua chi sets up the blind pipe, and the delivery port setting of blind pipe is in hua chi's lateral wall, the flower sets up permeable ground outside the pond, and the peak elevation on permeable ground should be less than hua chi's end elevation sets up rainwater well in the permeable ground, the rainwater well top is equipped with the gap, the top surface elevation of gap is higher than the peak elevation on permeable ground, and is less than elevation at the bottom of the delivery port of blind pipe, in the delivery port drainage of blind pipe extremely contact department on permeable ground sets up the