Garden rain water collecting and storing system

The invention discloses a garden rain water collecting and storing system. The garden rain water collecting and storing system comprises a plurality of reservoirs, the multiple reservoirs are arrangedin sequence from top to bottom, and the reservoir located at the lowest place is a water storing tank; the every adjacent two reservoirs are connected through water guide pipes, and a water pumping pipe for pumping water to the ground is arranged on each reservoir; the water pumping pipes of the reservoirs are connected with water pumping pumps, driving water wheels driven by water flow are arranged on the water guide pipes, and pump impellers controlled by the rotation of the driving water wheels are arranged on the water pumping pipes connected with the same reservoirs. Through the height difference formed between the reservoirs, when water in the high reservoir is sent into the lower reservoir, the water flow in the water guide pipes drives the driving water wheels to rotate, then thepump impellers are driven