In order to solve the problem that an existing nozzle can only be cleaned in a stop state, the invention provides a self-cleaning nozzle. The nozzle comprises a nozzle body; the nozzle body comprisesa first channel, a second channel, a third channel, a first filter channel, an air outlet channel of the first channel, a second filter channel, and a water outlet channel of the second channel; the two ends of the first filter channel communicate with the first channel separately, and the air outlet channel of the first channel communicates with the first channel and the third channel separately;and the two ends of the second filter channel communicate with the second channel separately, and the water outlet channel of the second channel communicates with the second channel and the third channel separately. According to the self-cleaning nozzle provided by the invention, the interior of the nozzle can be cleaned in the nonstop state, and the problem that an existing nozzle is liable to blockage is solved; and the self-cleaning nozzle is applicable for gas, water and other media, and sprayed water flow can be regulated.