The invention relates to a novel agricultural irrigation unmanned aerial vehicle based on the Internet of Things. The novel agricultural irrigation unmanned aerial vehicle comprises an unmanned aerial vehicle body, a power generating mechanism, a flying mechanism, a supporting frame and an irrigation mechanism. One end of the supporting frame is arranged in the unmanned aerial vehicle body. A buffer assembly comprises an annular pipe, a fixing shaft and four buffer units located in the annular pipe. The annular pipe is fixedly connected with the supporting frame. According to the novel agricultural irrigation unmanned aerial vehicle based on the Internet of Things, when the unmanned aerial vehicle lands, the supporting frame transmits the acting force to the buffer assembly, at the moment, the annular pipe starts to rotate along with the supporting frame, relative displacement between second fixing blocks on the fixing shaft and corresponding first fixing blocks on the inner wall of the annular pipe occurs, and then buffer springs start to be stretched, so that unmanned aerial vehicle landing buffer is achieved; and moreover, in a power supply circuit, ADP3000 is very low in power consumption and is only 500 [mu]A, thus, the cruising ability of the unmanned aerial vehicle is greatly improved, and the market competitiveness of the unmanned aerial vehicle is improved.