The invention discloses a southwest hilly area grooved slope road rainwater collecting and reutilizing
system. A rainwater collecting and reutilizing device is arranged between a
drainage ditch and asouthwest hilly area slop road; the rainwater collecting and reutilizing device is composed of a water collecting groove, a filter layer, a sand gravel layer, a
plant fence and a water extracting device; the water collecting groove is of a
closed cavity structure, and the filter layer, the sand gravel layer and the
plant fence are sequentially arranged at the top of the water collecting groove upwards; the water collecting groove and the
drainage ditch are arranged in parallel, an overflow hole is formed in the upper portion of the water collecting groove to be communicated with the
drainage ditch, and the bottom of the water collecting groove is lower than the bottom of the drainage
ditch; the water extracting device comprises a water suction pump, a water extracting
pipe and a water outlet
pipe, the water suction pump is arranged at one side of the
plant fence, the water extracting
pipe is connected with a water inlet of the water suction pump, and the water outlet pipe is connectedwith a water outlet of the water suction pump. Rainwater resources can be balanced, rainwater is reutilized, and water, soil and
nutrient loss at the southwest hilly area is reduced.