High-efficiency water seepage water absorption self-circulation sinking type green space and construction method thereof

The invention relates to a high-efficiency water seepage water absorption self-circulation sinking type green space. The green space comprises a water filtering layer and a self-circulation regulationand storage tank. The water seepage, water purification and water storage capacity of a traditional sinking type green space is limited, and under the condition of extreme rainstorm, rainwater overflows to a green space stagnant layer and even overflows to flow into a peripheral sewage channel, so that the urban sewage treatment workload is increased; and the traditional sinking type green spaceneeds manual watering in a dry season, so that the maintenance cost of the green space is increased, and water resources are wasted. According to the double-layer structure, water is provided in the counter-gravity direction by the aid of water supplementing pipes dispersed and erected between a partition plate and a tank bottom, so that rainwater is purified and collected, and the purpose of self-circulation is achieved.