The invention discloses a rainwater-collection recycling
system and a construction method thereof. The rainwater-collection recycling
system comprises a
control system, an initial-rainwater flow dividing well, a
water storage pool, a first lifting well, a filtering disinfecting chamber, a
clean water pool and a second lifting well, wherein the initial-rainwater flow dividing well, the
water storage pool, the first lifting well, the filtering disinfecting chamber, the
clean water pool and the second lifting well are sequentially communicated. The first lifting well is communicated with the bottom of the
water storage pool and arranged in the water
storage pool, and the second lifting well is communicated with the bottom of the
clean water pool, arranged in the clean
water pool and connected with a recycling point
pipe; a stopping weir is arranged in the initial-rainwater flow dividing well, a flow discarding groove is formed in the lower portion of the stopping weir, a rainwater feeding
pipe is arranged on the side wall of a water distribution area, the height of the rainwater feeding
pipe and the height of the pipe bottom of a first water discharging pipe are larger than or equal to the height of the groove top of the flow discarding groove, and the pipe bottom of an overflowing pipe is flush with the groove bottom of the flow discarding groove; a plurality of back washing pipes are laid on the bottom of the water
storage pool, the outer surface of the water
storage pool and the outer surface of the clean
water pool are sequentially covered with an anti-seepage film layer preventing
water seepage and a geotechnical cloth layer from inside to outside, construction and maintenance are convenient, and the recycled rainwater quality is high.