The invention relates to an irrigation device and belongs to the field of urban landscaping maintenance equipment. The novel irrigation device comprises a sealed rain reservoir (1) with a water inlet (2) and a water outlet (3). A water outlet pipe connected with the water outlet (3) is provided with a water flow switching valve (4). The novel irrigation device is characterized in that: the water outlet pipe is connected to an irrigation head (6) by a pumping motor (5); the reservoir (1) is also connected with a municipal pipe network water pipe (7); the water pipe (7) is connected to a switch (8) inside the reservoir (1); the lower part inside the reservoir (1) is provided with a sand filter blanket (9); the water flow switching valve (4) and the pumping motor (5) are connected with a humidity detection controller (10); and the humidity detection controller (10) and the pumping motor (5) are electrically connected with a storage battery (12) of a solar cell panel (11). The whole irrigation device has the advantages of full automation and low energy consumption, labor saving and capability of accurately utilizes energy sources.