The present invention relates to a non-point pollution natural purification system, The inflow section is formed in the road, the parking lot, and the ground to receive inflow and outflow, and a storage space is formed in which inflow water flowing into the inflow section is stored. A plurality of inflow- And a plurality of natural penetrating holes are formed on the bottom surface of the first permeation port layer and the first permeation port layer is formed on the bottom surface of the first permeation port layer. A permeate tank having a soil layer stacked on the first filter material layer, a plurality of water-moving pipes installed in the upper part of the storage tank in communication with one another to transfer and discharge inflow water overflowed to the storage tank, A filtration unit is installed in the water moving hole, and a cleaning means is installed on the inner wall of the storage tank to clean the filtration unit. The cleaning means includes a plurality of fixing members installed on the inner wall of the storage tank, a pair of rod members vertically moving upward and downward through the fixing member, and a plurality of vertically arranged rod members between the pair of rod members A buoyancy member mounted on the rod member for vertically upwardly moving the pair of rod members under the influence of inflow water stored in the storage tank and a stop member for stopping the pair of rod members by a predetermined distance . The non-point pollution natural remediation system according to the present invention has a relatively simple structure and is easy to maintain and maintain, as well as to improve the pretreatment efficiency in the storage tank or the permeation tank for the purification treatment and purify the non-point pollutant It is possible to rapidly disperse and disperse the stormwater into the permeation tank and the discharge tank from the storage tank, and thus it is possible to purify or discharge the treated water, so that the purification treatment efficiency is excellent according to the inflow conditions of the stormwater, Can be prevented. In addition, a filtration unit that performs a function such as a fiber filtration net and a mesh is installed in the water transfer hole formed in the storage tank, and cleaning means is provided on the inner wall of the storage tank to clean the filtration unit, So that it can be purified and drained.
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