The invention discloses a rainwater recycling system, comprising a concave green land, which is in the shape of round table, and provided with a plurality of border ditches, wherein the raised part between two border ditches is a furrow; a nutrition soil layer and a filler layer are orderly arranged on the furrow; a plurality of baffles, which are plugged at the top part of the furrow, and in the shape of triangular prism, wherein one angle of each baffle is contacted with the edge of the top part of the concave Greenland, and another two angles of the baffle are located at the upper part of the border ditches; an annular ditch, which is in the shape of ring, and arranged on the upper part of the concave Greenland, wherein a rainwater outlet is arranged on the inside wall of the annular ditch; a water pipe, of which one end is interconnected with the rainwater outlet while the other end is extended to the upper part of the top part of the concave type green land. The rainwater recycling system can process rainwater in small rain or early period, and also recycle rainwater in middle and later periods; moreover, the system is high in stability and able to use for a long time.